a. The test statistic (t-value) is approximately 1.63.
b. The critical value is 1.96.
c The P-value of the test is 0.008
d. Since the p-value is not provided, we cannot make a direct conclusion
How to explain the valuea Sample mean = 283.4 yards
Hypothesized mean (μ) = 280 yards
Sample standard deviation (s) = 10.41 yards
Sample size (n) = 25
t = (283.4 - 280) / (10.41 / √25)
t = 3.4 / (10.41 / 5)
t ≈ 3.4 / 2.08
t ≈ 1.63
The test statistic (t-value) is 1.63.
b) Since the sample size is 25, the degrees of freedom are (n - 1) = 25 - 1 = 24. he critical value is 1.96. This is the value of the test statistic that separates the rejection region from the non-rejection region. In this case, the rejection region is the area to the right of 1.96. If the test statistic is greater than 1.96, then we reject the null hypothesis. If the test statistic is less than or equal to 1.96, then we fail to reject the null hypothesis.
c) The P-value is the probability of obtaining a test statistic at least as extreme as the one we observed, assuming the null hypothesis is true. In this case, the P-value is 0.008. This means that there is a 0.8% chance of obtaining a sample average of 283.4 yards or more if the true mean is 280 yards.
d) In this case, since the p-value is not provided, we cannot make a direct conclusion. However, if α is 0.05, and assuming the p-value is 0.05 (as an example), then the observed sample mean would be statistically significant. We would reject the null hypothesis and conclude that there is evidence to support the claim that the average overall distance achieved by the golf ball brand is greater than 280 yards.
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Suppose there are 8 boys and 7 girls in a classroom. If one student is chosen at random to run a errand. What is the probability that the student will be a girl?
Answer:
47%
Step-by-step explanation:
There are 15 total students, so find the percentage of girls out of the total students: 7/15= .466, which is about 47%. To double check, you can do the boys and make sure it adds to 100%. 8/15= .533, which is about 53%. 47+53=100. So girls are 47% and boys are 53%
Worth five points! it doesnt tell me if what answer is right but if i get 75% or up i will mark the first person who answered with an actual answer brainliest and i don't lie about brainliest!! Please no nonsense answers I just want help :(
What is m∠U?
A. 17
B. 29
C. 46
D. 134
Answer:
D.46
Step-by-step explanation:
180-46-29= 105
angle V, 46 degree, and T= equal 180
105= V
t= 29
v+t+u= must equal 180 because all triangle equal 180 degrees
105+29+u=180
u=-105-29+180
u=46
CNNBC recently reported that the mean annual cost of auto insurance is 958 dollars. Assume the standard deviation is 144 dollars, and that the population is normally distributed. You will use a simple random sample of 99 auto insurance policies. Note: You should carefully round any intermediate values you calculate to 4 decimal places to match wamap's approach and calculations. Find the probability that a single randomly selected policy has a mean value between 934.8 and 965.2 dollars. P(934.8 < X < 965.2) = Enter your answer as a number accurate to 4 decimal places
Probability that a single randomly selected policy has a mean value between $934.8 and $965.2 is approximately 0.5819.
To find probability we can use the properties of the normal distribution.
Given,
Mean (μ) = $958
Standard deviation (σ) = $144
Sample size (n) = 99
We want to find the probability P(934.8 < X < 965.2). X represents the mean value of a randomly selected policy.
Calculate z-score for the lower value.
z1 = (934.8 - μ) / (σ / sqrt(n))
Calculate z-score for the upper value.
z2 = (965.2 - μ) / (σ / sqrt(n))
Cumulative probability between the z-scores.
P(934.8 < X < 965.2) = P(z1 < Z < z2)
If P(Z < z1) = 0.2658. P(Z < z2) = 0.8477. The probability of interest would be.
P(934.8 < X < 965.2) = P(z1 < Z < z2) = P(Z < z2) - P(Z < z1) = 0.8477 - 0.2658 = 0.5819
Probability that a single randomly selected policy has a mean value between $934.8 and $965.2 is approximately 0.5819.
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Find the perimeter of the polygon if
5 cm
6 cm
7 cm
P = ? Cm
Answer:
(2) is the answer for your question
Would you consider data on grades (of a particular class)
collected over two semesters to be cross-sectional or times series
data and why?
The data on grades (of a particular class) collected over two semesters would be considered as time series data.
Time series data refers to any set of data collected over time, where time acts as a variable in the data set. Time series data consists of repeated measurements of the same variable taken over regular intervals of time.
A time series is a collection of observations obtained by observing a single variable or a single data point over a certain period of time. Time series data are ordered sequentially and collected at evenly spaced intervals of time. In this question, the grades were collected over two semesters, which are considered a series of two data points that were collected over time. Hence, it is a time series data.
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The data on grades (of a particular class) collected over two semesters would be considered time series data whereas Cross-sectional data is a type of data that is collected at a particular point in time.
The data on grades (of a particular class) collected over two semesters would be considered time series data. This is because time series data is collected over time at regular intervals, and in this case, the data is collected over two semesters, which are specific periods of time.
Time series data is a type of data that is collected over time at regular intervals. This type of data is commonly used in various fields such as economics, finance, and statistics. Time series data is useful in identifying trends, seasonal patterns, and cycles within the data. It can also be used to predict future values based on the patterns that are observed within the data.
Cross-sectional data is a type of data that is collected at a particular point in time. This type of data is commonly used in surveys and opinion polls. Cross-sectional data is useful in identifying the characteristics of a particular group of people or entities at a particular point in time. It is also used to compare the characteristics of different groups of people or entities at the same point in time.
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Someone help plz and make plz make sure it’s right? :)
a boy has only dimes and quarters in his piggy bank. If he has 50 coins worth 7 dollars and 55 cents altogether, how many quarters does he have in his bank
Answer:
30.2
Step-by-step explanation:
a qurter is 25 and there is 100 cents in a dollar so u do 755 divided by 25
Complete the table for the given rule. 1 Rule: y = x 4 х y 1 4 13 4 2 을
Answer:What is the symbol at the end?
Step-by-step explanation:
Help me for more points right answer only
Answer:
slope- intercept form
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + b ( m is the slope and b the y- intercept )
Write the number for thirteen million thirty thousand
Answer:
13,030,000
Step-by-step explanation:
write first the value for thirteen millions,
13,000,000 and then also put down the thirty thousand which is; 30,000. afterwards add the two
13 000 000
+ 30 000
=. 13 030 000
Answer:
13,030,000
Step-by-step explanation:
13,000,000
+ 30,000
13,030,000
Find the confidence interval specified. The mean score, X, on an aptitude test for a random sample of 9 students was 75. Assuming that o= 10, construct a 95.44% confidence interval for the mean score, u, of all students taking the test. Select one: O 55 to 95 O 68.3 to 81.7 0 72.8 to 77.2 O 70.0 to 80.0
The 95.44% confidence interval for the mean score is approximately 68.47 to 81.53. Among the given options, the closest match is 68.3 to 81.7. Option b is correct.
To construct a confidence interval for the mean score, we can use the formula:
CI = X ± Z × (σ / √n)
where X is the sample mean, Z is the z-score corresponding to the desired confidence level, σ is the population standard deviation, and n is the sample size.
In this case, the sample mean X is 75, the population standard deviation σ is 10, and the sample size n is 9. The desired confidence level is 95.44%, which corresponds to a z-score of approximately 1.96.
Plugging in these values, we get:
CI = 75 ± 1.96 × (10 / √9)
= 75 ± 1.96 × (10 / 3)
≈ 75 ± 6.53
Therefore, the 95.44% confidence interval for the mean score is approximately 68.47 to 81.53.
Among the given options, the closest match is 68.3 to 81.7, so the correct answer is b.
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Adrian can purchase an 11-pound item from several different sellers. Which is the best buy?
1. Buy online for $50 plus pay shipping and handling costs of $0.89 per pound.
2. Buy online for $57 plus pay shipping and handling costs of $0.49 per pound.
3. But at a local store where the price is $60 and use a $5-off coupon.
4. Buy at a local store where the item’s regular price is $58 and it is on sale for 10% off
Answer:
4. Buy at a local store where the item’s regular price is $58 and it is on sale for 10% off
Step-by-step explanation:
For the sake of someone needing help present time this is how you do it;
1st- 50 + (.89 x 11) = 59.79
2nd- 57 + (.49 x 11) = 62.39
3rd- 60 - 5 = 55
4th- 58 - 10% or 58 x .10 = 52.2: Lowest Answer
Identify the volume the solid of revolution that is produced when
a rectangle with length 6 and width 3 is rotated around one of its
shorter sides.
Answer:
Step-by-step explanation:
which of the following expressions are equivalent to -2/3? select all that apply
A. -1/9 x 6
B. -15 ÷ 10
C. 12 ÷ -18
D. -3/4 ÷ 1/2
E. -8/9 x 3/4
Answer:
A.
C.
E.
Step-by-step explanation:
A
-1/9×6=
-1/9×6/1= -6/9 = -2/3
B
-15 ÷ 10
-15/1 ÷ 10/1
-15/1 × 1/10 = -15/10 = -3/2
C
12 ÷ -18 =
12/1 ÷ -18/1 =
12/1 × -1/18 = -12/18 = -2/3
D
-3/4 ÷ 1/2 =
-3/4 × 2/1 = -6/4 = -3/2
E
-8/9 × 3/4 = -24/36 = -2/3
I need this answered quickly!
Please and Thank you!
Answer:
A
Step-by-step explanation:
-0.2 translates to -2/10 and then simplifies to -1/5 so you would minus it from the bigger number which is 3/5 because its positive.
52 )7,696 with reminder
Which numbers are integers?Check all that apply.
15
-9
Two-thirds
6 and StartFraction 1 Over 9 EndFraction
0
-3,128
4.76
Answer:
the intergers include all negative whole numbers,zero,positive whole numbers
Answer:
the answer is 15. -9. 0. -3,128
Step-by-step explanation:
PLEASE HELP!!
I don’t know how to solve Law of Sines, it doesn’t make sense to me.
I’ll award the brainliest!
If I have a two-way between subjects ANOVA with two groups per factor, how many factors do I have and how many groups do I have overall in my study? (Hint: the first number should be the number of factors that you have and the second number should be the number of groups that you have) 4; cannot be determined O 2; cannot be determined O 4: 2 O 2:4 Question 14 2 pts When doing a two-way between subjects ANOVA, can I concurrently have both a main effect and an interaction? No Yes Question 15 2 pts I do a two-way between-subjects ANOVA and find that my interaction F-test is significant. What do I do next? I would do a post-hoc Tukey test o I would look at my b-weights to see which variables are significant o I would do a post-hoc Bonferroni test I would do a simple main effects analysis Question 16 2 pts True or false: when I have an interaction in a two-way between-subjects ANOVA, the means across the levels for one factor significantly varies depending on which level of the second factor a person is looking at. True False Question 17 2 pts What type of correlation would I use if I have two factors that are both on an ordinal (or rank) scale? Spearman Phi (or a chi-square) Pearson O Point-biseral (or a t-test) D Question 18 2 pts When doing a multiple regression, how many outcome variables would I normally have in my model or analyses? As many as I think is relevant for my study 0 1 02 Question 19 2 pts What does b refer to in a regression analysis? Constant Unstandardized weight of a predictor variable Outcome variable Standardized weight of a predictor variable Question 20 2 pts a I do a multiple regression and find that my overall regression model is significant What do I do next? I would do a post-hoc Tukey test I would do a post-hoc Bonferroni test I would do a simple main effects analysis I would look at my b-weights to see which variables are significant D Question 21 2 pts Which of the following shows the largest positive standardized regression weight? ob' = -0.30 ob -0.15 Ob* -0.35 Ob -0.38
To answer your questions:
14. In a two-way between-subjects ANOVA with two groups per factor, you have 2 factors and a total of 4 groups in your study.
15. If the interaction F-test in a two-way between-subjects ANOVA is significant, the next step would be to conduct a post-hoc analysis to explore the specific group differences and determine the nature of the interaction effect. The choice of post-hoc test (e.g., Tukey, Bonferroni) would depend on the specific research question and the number of comparisons being made.
16. True. When there is an interaction in a two-way between-subjects ANOVA, it means that the means across the levels of one factor significantly vary depending on which level of the second factor is being considered.
17. If you have two factors that are both on an ordinal (or rank) scale, you would use the Spearman correlation coefficient to measure the relationship between these factors.
18. In a multiple regression analysis, you can have multiple outcome variables, but typically you would have only one outcome variable that you are trying to predict.
19. In a regression analysis, the "b" refers to the unstandardized weight (also known as the regression coefficient) of a predictor variable. It represents the change in the outcome variable for a one-unit change in the predictor, holding other predictors constant.
20. If the overall regression model is significant, the next step would be to examine the individual predictor variables (b-weights) to determine which variables are significant in predicting the outcome variable.
21. The largest positive standardized regression weight is represented by ob* = -0.35.
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Compute the z-score if X = 60, p = 10, and a = 30. Report your answer to the third decimal place. Answer: Question 17 Not yet answered Points out of 0.80 Flag question 17. In a normal distribution, what proportion of people have a score above 50 when : -30, and o-15? Report your answer to the fourth decimal place.
Approximately 0.0668 or 6.68% of people have a score above 50 in the given normal distribution.
To compute the z-score, we can use the formula:
z = (X - μ) / σ
Where:
X = observed value
μ = mean of the distribution
σ = standard deviation of the distribution
Given:
X = 60
μ = 10
σ = 30
Substituting these values into the formula:
z = (60 - 10) / 30
z = 50 / 30
z = 1.667 (rounded to three decimal places)
Therefore, the z-score is approximately 1.667.
Moving on to the second question, we need to find the proportion of people with a score above 50 in a normal distribution with a mean of -30 and a standard deviation of 15.
To calculate this proportion, we can use a standard normal distribution table or a statistical calculator. From the standard normal distribution table, we can find the area to the left of 50, which is 0.9332 (rounded to four decimal places).
Since we want the proportion above 50, we subtract this value from 1:
Proportion = 1 - 0.9332 = 0.0668 (rounded to four decimal places)
Therefore, approximately 0.0668 or 6.68% of people have a score above 50 in the given normal distribution.
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Write the expression using a positive exponent. Leave in fraction form and do not expand numbers, leave in exponential form.
For example, 2^-7 write as 1/2^7, do NOT write as 1/128 or 0.0078125. NO SPACES!
-8k^-4/k^6
Answer:
i have to see the assigment
Step-by-step explanation:
The radius r of a sphere is increasing at a rate of 5 inches per minute. (a) Find the rate of change of the volume when r = 12 inches.
To find the rate of change of the volume when the radius is 12 inches, we can use the formula for the volume of a sphere:
V = (4/3) * π * [tex]r^3[/tex]
To find the rate of change of the volume, we need to take the derivative of the volume function with respect to time (t) using the chain rule. The derivative of the volume function with respect to time will give us the rate of change of the volume.
dV/dt = (dV/dr) * (dr/dt)
where dV/dt is the rate of change of the volume, dV/dr is the derivative of the volume with respect to the radius, and dr/dt is the rate of change of the radius.
Given that the radius is increasing at a rate of 5 inches per minute (dr/dt = 5), we can substitute this value into the formula.
Now, let's calculate the derivative of the volume with respect to the radius (dV/dr):
dV/dr = d/dt [(4/3) * π[tex]* r^3[/tex]] = (4/3) * π * [tex]3r^2[/tex]= 4π[tex]r^2[/tex]
Substituting the values into the formula for the rate of change of the volume:
dV/dt = (dV/dr) * (dr/dt) = 4π[tex]r^2[/tex]* 5 = 20π[tex]r^2[/tex]
When the radius is 12 inches (r = 12), we can plug this value into the formula to find the rate of change of the volume:
dV/dt = 20π[tex]r^2[/tex] = 20π(1[tex]2^2[/tex]) = 20π * 144 = 2880π
Therefore, when the radius is 12 inches, the rate of change of the volume is 2880π cubic inches per minute.
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Decide whether the composite functions, fog and gof, are equal to x. f(x) = * 1,5 g(x) = 2x - 5 - +5 2 O No, no O Yes, yes O Yes, no O No, yes.
No, neither fog nor gof is equal to x. The expressions fog(x) = 2/5x - 1 and gof(x) = 2/5x - 5 have different constant terms, indicating that they are not equal to x. The correct option is O (No, no.)
To determine whether the composite functions, fog and gof, are equal to x, we need to evaluate them using the functions f(x) = 1/5x and g(x) = 2x - 5.
First, let's calculate fog:
fog(x) = f(g(x)) = f(2x - 5) = 1/5(2x - 5) = 2/5x - 1
Next, let's calculate gof:
gof(x) = g(f(x)) = g(1/5x) = 2(1/5x) - 5 = 2/5x - 5
Comparing fog and gof, we can see that they are not equal to x. Specifically, fog(x) = 2/5x - 1 and gof(x) = 2/5x - 5.
Therefore, the correct option is "No, no" as neither fog nor gof is equal to x.
Alternatively, if we simplify fog and gof as a single expression, we have fog(x) = 2/5x - 1 and gof(x) = 2/5x - 5. Since both expressions have different constant terms, they cannot be equal to x.
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Please help me on this question if you would want brianleist!! Tank yah!! ^^
Answer: And the answer is b 6,7
Step-by-step explanation:
Did you meant “Please help me on this question if you would want brainliest!! Thank you!!”
Determine the extreme point (x*, y*) and its nature of the following function: z = 25x + 16y - 4xy - 2x² - y² + 30
The extreme point (x*, y*) of the function z = 25x + 16y - 4xy - 2x² - y² + 30 is (-1.75, 8) and it is a maximum point.
To find the extreme point and its nature, we need to take the partial derivatives of the function with respect to x and y and set them equal to zero. The extreme point occurs when both partial derivatives are zero.
Taking the partial derivatives, we have:
∂z/∂x = 25 - 4y - 4x
∂z/∂y = 16 - 2y
Setting these derivatives equal to zero and solving the system of equations, we find:
25 - 4y - 4x = 0 ...(1)
16 - 2y = 0 ...(2)
From equation (2), we can solve for y:
2y = 16
y = 8
Substituting this value of y into equation (1), we can solve for x:
25 - 4(8) - 4x = 0
25 - 32 - 4x = 0
-4x = 7
x = -7/4 = -1.75
Therefore, the extreme point (x*, y*) is (-1.75, 8).
Since the second derivative test confirms that the point is a maximum, we can conclude that the extreme point (x*, y*) = (-1.75, 8) is a maximum point.
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ASAP‼️ DUE TONIGHT❕‼️
Answer:
99.95 yd
Step-by-step explanation:
Used the formulas
C=2πr
d=2r
2. A cereal box is in the shape of a rectangular
prism. What is the volume of the cereal box?
Express your answer as a decimal rounded
to the nearest tenth if necessary.
Answer:
169.8 or 169 4/5
Step-by-step explanation:
Times all of the numbers together
The volume of a rectangular prism can be written as 168 cubic in
What is the volume of a rectangular prism?A rectangular prism is a three-dimensional shape that has two at the top and bottom and four are lateral faces.
The volume of a rectangular prism=Length X Width X Height
WE are given the dimensions as;
length= 8 in
Width = 1 3/4 = 7/4
Height = 12 1/8 = 96/8 in
Thus, the volume of a rectangular prism can be written as:
8 x 7/4 x 96/8
= 168 cubic in
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help I will give brainiest if you do the last ones
The diameter of a semicircle is 10 meters. What is the perimeter of the semicircle, in meters? Round your answer to the nearest tenth.
Answer:
25.7 m
Step-by-step explanation:
The formula for the circumference of a circle is C = 2(pi)(r), where r is the radius, which in turn is half the diameter. Thus, the formula for the circumference is C = (d)(pi). The perimeter of a semicircle is half that, or
C = (pi)(r), which here is (3.14)(5 m) = 15.7 m. Finally, the total perimeter is the sum of this 15.7 m and the 10 m diameter of the circle:
P = 15.7 m + 10 m = 25.7 m
Please see picture. Which statement must be true?
Choose C.
x^2 = a/b must be true.