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
exis [7]
3 years ago
9

The director of a fitness center wants to examine the effects of two exercise classes (spinning and aerobics) on body fat percen

tage. A six-week spinning class and a six-week aerobics class are offered at the same time and on the same days, so that a person can enroll in only one of them. A new class of each is about to begin, and each class has 25 people in it. Ten people are randomly selected from each class.Each person's body fat percentage is measured at the beginning and again at the end of the six-week class. Using the change in body fat percentage as the response variable and conducting a test, the director dete.rmines that there is a significant difference between the treatment means. Which of the following is a confounding variable in the study?(A) The director's choice of spinning and aerobics classes as the types for use in the study(B) The random sample of 10 people from each class.(C) The participants' choice of which class to take(D) The use ofbody fat percentage as the measure of effectiveness ofthe treatment(E) The fact that both classes were conducted three times each week at the same time of day and for the same amount of time each day
Social Studies
1 answer:
Stells [14]3 years ago
3 0

Answer: C. The participants' choice of which class to take

Explanation:

The classes were not arranged in an optional way for the students that enrolled, the best option would be for the director of the fitness team to allow participants choose the class they want to partake in. The best he can do for them is to educate them on the various classes but the enrollment should be basically their choice to make because many or some participants that enrolled may not be happy with his choices for them.

You might be interested in
What is your taste in fashion, music? Explain why?
babymother [125]

Answer:

well, I wear flannels, ripped jeans, adidas hightops, combat boots, and leather jackets, and of course don't forget the backwards flat-billed baseball hat. Taste in music, Love rap, and country, Eminem, Sage the Gemini, Logic, Pitbull, and for country, Sam Hunt, Alan Jackson, Morgan Wallen, Garth Brooks, and Kenny Chesney. So yep, there is my style and life, but right now since it's summer, I'm wearing more of a style of shell necklaces, shell anklet, shorts, and baggy shirts, or just tanks I guess, I wear mostly athletic clothing in the summer LOL ;) There we are, there's me XD

Explanation:

7 0
3 years ago
Read 2 more answers
Which statement best describes the framework of government established by the constitution
Firlakuza [10]
B. a system of checks and balances keeps each of the three branches from having too much power
4 0
3 years ago
Read 2 more answers
Laggerstatten is important because:
puteri [66]

Answer:

Laggerstatten is very important because they preserve far better and more of the biota than the one that occurs under normal preservation conditions. So the paleontologist can see as completely as possible the ecological interaction of the organization in the particular habitat

Thank

Explanation:

Hope you find it useful

3 0
3 years ago
How did the French and Indian war reveal problems in the British colonies, and how did the war create much larger problems for t
Nutka1998 [239]
It put the British in great debt and the British 'punished' the colonists by greatly increasing their taxes and put many cruel laws up like the Intolerable Acts to help pay these things off
6 0
3 years ago
The Boston Massacre was the first instance of extreme violence that took place, and took the colonists one step closer to
Masja [62]

Answer:

B: revolution

4 0
3 years ago
Read 2 more answers
Other questions:
  • provide two positives and two negatives the Suarez family would face if they switched to organic farming.
    11·2 answers
  • Which transportation system has had the BIGGEST impact on providing Georgians with consumer goods?
    6·1 answer
  • Five-year-old Sarah tells her kindergarten teacher, "We had dinner at Mark's house last night." The teacher has no idea who Mark
    6·1 answer
  • Based on letter identification experiments, such as those performed by Anne Treisman and Hilary Schmidt, which alternative most
    11·1 answer
  • Mussolini took advantage of which of the following to rise to power? (4 points) A. Bitterness against the Italian military B. De
    10·1 answer
  • What is the significance of the U.S. supreme court case king Vs Chapman?
    15·2 answers
  • Write any two features of peace culture.​
    15·2 answers
  • The Akshardham Temple, shown above, is a historic Hindu temple in New Delhi. As of 2010, over 80% of the population in _________
    5·1 answer
  • 1.6 Discuss ONE challenge you might face post-school that you would turn into an<br>opportunity<br>​
    9·1 answer
  • How does a hypothesis differ from a scientific theory.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!