1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
harina [27]
3 years ago
10

A researcher is interested in the effects of exercise on mental health and he proposes the following study: Use stratified rando

m sampling to ensure representative proportions of 18-30, 31-40 and 41- 55 year olds from the population. Next, randomly assign half the subjects from each age group to exercise twice a week, and instruct the rest not to exercise. Conduct a mental health exam at the beginning and at the end of the study, and compare the results.
(a) What type of study is this? (observational or experimental study)?
(b) What are the treatment and control groups in this study?
(c) Does this study make use of blocking? If so, what is the blocking variable?
(d) poin Does this study make use of blinding?
Mathematics
1 answer:
Andre45 [30]3 years ago
6 0

Answer:

Step-by-step explanation:

(a) The type of study described in the question is referred to as an experimental study.

(b) The treatment group is the group that exercises 2 times a week, whereas the control group is the group that does not exercise.

(c) Yes, the study under consideration makes use of blocking.

The blocking variables are 18-30-year-olds, 31-40-year-olds, and 41-55year olds.

(d) No, the study under consideration did not make use of blinding because the patients know if they are in the group that exercises or the one that doesn’t.

You might be interested in
What is the solution to the system x+ y =4 and 2x - y = -1
Lostsunrise [7]

Answer:

Step-by-step explanation:

hello :

the system is :  x+ y =4 ...(*)

                       2x - y = -1...(**)

add(*) and (**) : 3x=3    so : x=1

put this value into (*) : 1+y=4     so : y=3

one solution : (1 , 3)

4 0
3 years ago
Omar needs at least $8 to buy lunch. Which number line represents this scenario?
Shtirlitz [24]

Answer:

I'd say none, as we're missing something in this problem. Make sure you've included everything to solve this problem. Thanks.

7 0
2 years ago
Write the value of 17 tens in standard form
lyudmila [28]
17 tens can be said as 17 x 10
So 17 x 10 is 170
170 is in standard form
3 0
3 years ago
Read 2 more answers
a 96 ounce container of orange juice costs $4.80. at what price should a 128 ounce container be sold in order for the unit rate
Hunter-Best [27]
4.8 / 96 = x / 120
96x = 576
x = 576/96
x = 6

check :
unit rate for 96 oz container at 4.80 = 4.80/96 = 0.05 per oz
unit rate for 120 oz container at 6.00 = 6.00/120 = 0.05 per oz

Basically ur looking for an equivalent fraction (and that is what proportions are...this will reduce to the same unit rate. So ur answer is $ 6.00

5 0
3 years ago
This is Math 3. I am confused because of the -2
zhuklara [117]

Answer:

x=5

Step-by-step explanation:

for the work I use a website called symbolab.com and it does all the work and everything for you!

6 0
3 years ago
Other questions:
  • Saturn is 8.867 × 108 miles away from the Sun. Uranus is 1.787 × 109 miles away from the Sun. Approximately how many times farth
    8·1 answer
  • What is $5.60 for 4 pounds as a unit rate.
    15·1 answer
  • 60% of all vehicles examined at a certain emissions inspection station pass the inspection. Assuming that successive vehicles pa
    12·2 answers
  • Is 75 divided by 5=15 an equation or expression?
    6·2 answers
  • I need help with this math problem please
    15·1 answer
  • At the beginning of the month, Hercules had 96 violas in his store. He sold 9 violas during the month. What is the ratio of the
    15·1 answer
  • Evaluate. Write your answer as a fraction in simplest form.<br><br> (1/2) 4
    10·1 answer
  • When the first Harry Potter movie came out, "The Sorcerer's Stone," a local book store marked all the Harry Potter books up by 4
    5·2 answers
  • Sam is selling homemade cookies to raise money for charity. Each cookie sells for $.50. Sam spent $90 on baking supplies and eac
    5·1 answer
  • The equation y-1=-7(x-3) is written in point-slope form. What is the y-intercept of the line?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!