Determine whether the following study is an observational study or an experiment. If the study is an experiment, identify the control and treatment groups, and discuss whether single- or double-blinding is necessary. If the study is observational, state whether it is a case-control study, and if so, identify the cases and controls.
In a study of the effects of magnets on back pain, some participants were treated with magnets while others were given nonmagnetic objects with a similar appearance. The magnets did not appear to be effective in treating back pain. Choose the correct answer below.
A. Experiment, the treatment group is patients that used the magnets and the control group is patients that received the placebo; double blind
B. Observational study; case control; the cases are the patients that received magnets, the controls are the patients that received placebos
C. Observational study; not case-control
D. Experiment, the treatment group is all patients and the control group is patients that received the magnets; single blind

Answers

Answer 1

Answer:

A. whether a woman took hormones.

B. whether to woman in the study had a heart attack.

D. access to health care

Step-by-step explanation:

The study conducted to observe the menopausal woman must be supported with their health history. Some woman may have menopause at an early age while other go towards this at a later age. This can be due to smoking, hormone intake, severe diseases like heart attack or cancer and their routine health checkup details. There variables must be observed and included in experiment to reach a conclusion.


Related Questions

make k the subject of the relation ky-k=y^2​

Answers

Step-by-step explanation:

ky - k = y^2

ky - k ÷ y = y^2 ÷ y

k = y

Find the volume of the right cone shown as a decimal rounded to the nearest tenth

Answers

Answer:

375π

Step-by-step explanation:

Volume of a cone = 1/3πr²h

Radius, r = 10/2 = 5

Height, h = 45

Volume V = 1/3 * π * 5² * 45

V = π * 25 * 15

V = 375π

how much normally is retaking a high school class?

Answers

Answer:

What do you mean?

Step-by-step explanation:

Which values of a, b, and c correctly represent the answer in simplest form? 6 al- o a=1,0-5,0-9 a= 10,5= 18.0= 1 a=9,0-5,0- 1 a= 1,5= 10 0= 18​

Answers

Answer:

The question is not explained well, Please explain it better or take a screenshot or something

Step-by-step explanation:

Tessellations

Find the coordinates of quadrilateral PQRS with vertices P(1, 4), Q(-1,4), R(-2, -4) and
S(2, -4) under the translation (x,y) ⇒ (x-5,y+3)

a. P' (-4, 7), Q' (-6, 7), R' (-7, -1) and S' (-3, -1)
b. P' (6, 7), Q' (4, 7), R' (3, -1) and S' (7, -1)
c. P' (-4, 1), Q' (-6, 1), R' (-7, -7) and S' (-3, -7)
d. P' (6, 1), Q' (4, 1), R' (3, -7) and S' (7, -7)

Please select the best answer from the choices provided

Answers

Answer:

A. P' (-4, 7), Q' (-6,7), R' (-7, -1) and S' (-3, -1)

Step-by-step explanation:

I calculated it logically

Josh likes to play an outdoor beanbag toss game in his spare time. On any toss, he has about a 30% chance of getting a bag into the hole. As a challenge one day, he decides to keep tossing beanbags until he makes it. Starting on line 5 of the random number table, how many times does Josh have to toss the beanbag in order to make it in the hole if we let success = 0–2 and failure = 3–9?

Answers

Answer:

B

Step-by-step explanation:

HELP ME PLEASEEEEEEEEEEEEEEEE

Answers

Answer:

52

Step-by-step explanation:

break down the shapes into simpler ones

do base X height for both

add both

Answer:

52cm^2

Step-by-step explanation:

Split the figure into 3 rectangles or squares and find the area of the individual shapes, add all the areas together and you should get 52cm^2

which number makes the statement true
12:30 = x:50
A) 30
B) 32
C) 35
D) 41

Answers

Answer:

20

None of the answers shown are correct

Step-by-step explanation:

12 : 30 = x : 50

Handle as a proportion

12/30 = x/50

multiply both sides by 50

12/30 * 50 = x

20 = x

Dividing fractions
7/10 2

Answers

7/10 : 2 = 7/20 = 0.35

Answer:

yeah it's 0.35 I agree with the other guy

What shows a example of symmetry?

Answers

Answer:

symmetry is a mirror image

Step-by-step explanation:

all it really is if you were to cut it in half would one side match the other

Answer:

Square

Step-by-step explanation:

If you cut it any where it will become symmetrical

Name the solid figure formed by the net.
1
A Cube
B Cuboid
c Cylinder
D
Cone

Answers

u didn’t give a picture

A bus makes a stop at 2:30, letting off 10 people and letting on 3. The bus makes another stop ten minutes later to let off 2 more people. How does the number of people on the bus after the second stop compare to the number of people on the bus before the 2:30 stop?

Answers

1 person is still
on the bus

Observe the following graph:

What is the exact value of cos0

Answers

Answer:

(Sqrt)2/2

Step-by-step explanation:

Some one help will give brain

Answers

Answer:

what the link? didfbdsfaahsdfhsd

Step-by-step explanation:

Under her cell phone plan, Rajani pays a flat cost of $65 per month and $5 per gigabyte. She wants to keep her bill under $85 per month. Write and solve an inequality which can be used to determine gg, the number of gigabytes Rajani can use while staying within her budget.

Answers

Answer:

gg ≤ 4

Step-by-step explanation:

Total cost(gg) = $65 + ($5/mo)(gg)  =  $85

Ths reduced to $85 - $65 =  ($5/mo)(gg), which returns gg = 4

The correct answer is an inequality:  gg ≤ 4

Answer:

Inequality = 5g+65<85 Anwser = g<4

Step-by-step explanation:

Which expression is shown on the number line?

Answers

Answer: i think its e

Step-by-step explanation:......

Answer:

no.A 5/3÷×1/3 is the answer

A middle school coach wrote down the time, in seconds, of her students’ 100-meter dash as shown in the table. Student Time -(seconds … ) Gary 11.9 Rick 12.3 Phillip 13.5 Jorge 12.0 Robert 12.3 Jeremy 16.0 If the slowest time and the fastest time are removed from the data, how does the new mean compare to the mean of the ..

Answers

Answer:

D. The mean would decrease as there is less variability in the data.

Step-by-step explanation:

So, let’s find the mean with all of those numbers. First of all we should order them from least to greatest.

11.9, 12.0, 12.3, 12.3, 13.5, 16.0

We add them all up, and get 78! Once we get this total, we must divide it by how many numbers there are! There are six numbers, so 78/6.

78/6 is equal to 13. So the mean for all those numbers is 13.

Now let’s find the mean if we cross out the greatest and least numbers, the greatest number is 16.0, and the least number Is 11.9.

So, our new data set is:

12.0, 12.3, 12.3, 13.5

Add those all up to get 50.1

Divide the total by the numbers we got left, which is 4!

50.1/4 is equal to 12.525.

So the mean of our new data set is 12.525!

So that’s how I got the answer, have a nice day! Please tell me if I’m wrong!

12.525 < 13

4. Paolo is filling a cylindrical water bottle. Unfortunately it is too big to fit in the sink he is filling up at so he has to use cone cups to fill up the bigger water bottle. The cone cups have a radius of 1 in, and a height of 3 in. how many cone cups would it take to fill the cylindrical water bottle?​

Answers

Answer:

The answer is below

Step-by-step explanation:

The question is not complete, we need to be given the dimensions of the big cylindrical water bottle. Let us assume, that the big bottles has a dimension of radius 3 in and height 5 in.

Solution:

Firstly, we need to find the volume of the big cylindrical bottle, then we find the volume of the small cone.

Volume of the cylindrical bottle = πr²h = π(3²)5 = 45π in³

Volume of the small cone = πr²h/3 = π(1²)(3/3) = π in³

Therefore the number if cups required to fill the water bottle is the ratio of the volume of the cylinder to the volume of the small cone. Hence:

number of cone cups = 45π in³ / π in³ = 45 cups

Hence 45 cups of the cone would be needed to fill the cylindrical bottle

How much is 331 ft in meters?

Answers

it would be 100.889, darling. hope this helps. <3

8y - (5y + 13 ) = -7​

Answers

Answer:

y=2

Step-by-step explanation:

8y-5y-13=-7

3y-13=7

3y=-7+13

3y=6 /3

y=2

Solve the simultaneous equations
y = 3 – 2x
x2 + y2 = 18
Show clear algebraic working.

Answers

(

x

,

y

)

=

(

3

5

,

4

1

5

)

or

(

x

,

y

)

=

(

3

,

3

)

Explanation:

Given

[1]

XXX

y

2

x

=

3

[2]

XXX

x

2

+

y

2

=

18

Re-writing [1]

[3]

XXX

y

=

2

x

+

3

Substituting

(

2

x

+

3

)

from [3] for

y

in [2]

[4]

XXX

x

2

+

(

2

x

+

3

)

2

=

18

Simplifying

[5]

XXX

x

2

+

4

x

2

+

12

x

+

9

=

18

[6]

XXX

5

x

2

+

12

x

9

=

0

Factoring

[7]

XXX

(

5

x

3

)

(

x

+

3

)

=

0

x

=

3

5

or

x

=

3

case 1:

x

=

3

5

Substituting

3

5

for

x

in [3]

XXX

y

=

2

(

3

5

)

+

3

=

4

1

5

case 2:

x

=

3

Substituting

(

3

)

for

x

in [3]

XXX

y

=

2

(

3

)

+

3

=

3

What is the volume of a cylinder with a
height of 18.5 m and a base with a
diameter of 5.2 m, to the nearest tenth of a
cubic meter?

392.9 m^3 is the real answer

Answers

Answer:

Yes it is is 392.9 m^3

Step-by-step explanation:

Volume of cylinder is π*r^2*h, π times radius squared times height.

Since the diameter is 5.2, the radius is 2.6 (half of it). 2.6^2 = 6.76, and the height is 18.5, 6.76*18.5 = 125.06. Multiply it by pi to get 392.887577258, round it to 392.9, The volume is 392.9 cubic meters.

PLEASE HELP I WILL GIVE BRAINLIEST (seven grade math)
On a Saturday morning,
Meaghan measured the temperature
and found a 5 degree increase An
hour later, the temperature
increased by another degree When a rain storm came through, the temperature dropped 6 degrees. What is the difference between the
temperature in the morning and the temperature after the rainstorm?

Answers

Answer:

Step-by-step explanation:

In the morning it was six degrees because you added that one other degree. But when it started raining it dropped down 6 degrees which will make it 0


HELP

What is the equation of the trend line in the scatter plot ?

Answers

Yo bro I need food give six seven

Question 11 of 20: Select the best answer for the question. 11.

Given gross sales of $50,000, sales returns and allowances of $6,000, beginning inventory of $4,000, net purchases of $8,000, ending inventory of $2,000, and operating expenses of $4,500, calculate net income.
A. $32.500
B. $28,550
C. $29.500
D. $30,570​

Answers

Answer: $29500

Step-by-step explanation:

Given the information from the question, the net income will be calculated as:

Net sales = Gross profit - sales returns and allowances

= $50000 - $6,000

= $44000

Gross profit = Net sales - Cost of goods sold

= $44000 - $10000

= $34000

Net income = Gross profit - Operating expense

= $34000 - $4500

= $29500

A pair of dice was rolled many times
and the results appear below. Based
upon these results, what is the
experimental probability of rolling a 2?
Outcome
2
3
3
4
5
6
7
8
9
10
11
12
Frequency
3
6
00
11
14
16
15 12
9
5
1
The percent probability is = [ ? ]%
Round to the nearest percent.
Enter

Answers

I think that would be 16

Help please!!!!!! As soon as possible

Answers

(-3,2) for middle and 4 for radius. Radius is the distance from the center to the circle. So you can count with the units on the grid. Hope this helps!!

What’s the correct answer?? I will mark as brainlest

Answers

Im pretty sure it’s 8

I’m so sorry if I’m wrong… I hope u have a good day

What is the value of x?
A) Impossible to determine
B)62°
C)56°
D)76°

Answers

The answer would be 62°

32. [Problem Solving 2] *
On Martha's 9th birthday, her mother
made a cake which had the digits 0 to 9
around the edge in red icing. Using the
guidelines below, her mother cut the
cake into 3 pieces so that the numbers
on each piece added to the same total.
Mark the cuts. What fraction of the
whole cake was the largest piece?

Answers

Answer:

The three pieces will have the following set of numbers

(9,6,0)  (8, 4,3), (7,5, 1,2)

Step-by-step explanation:

Given,

Martha's mother has marked the cake into 10 equal pieces starting from 0 t0 9

Now, she divided the cake in a manner that sum of digits on each of the three pieces is equal

0,1,2,3,4,5,6,7,8,9

(9,6,0)  (8, 4,3), (7,5, 1,2)

Hence the three pieces will have the following set of numbers

(9,6,0)  (8, 4,3), (7,5, 1,2)

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