Question 10 At a local health club a researcher samples 75 p

Question 10) At a local health club, a researcher samples 75 people whose primary exercise is cardiovascular and 75 people whose primary exercise is strength training. The researcher’s objective is to assess the effect of type of exercise on cholesterol. Each subject reported to a clinic to have their cholesterol measured. The subjects were unaware of the purpose of the study, and the technician measuring the cholesterol was not aware of the subject’s type of exercise. This is

A) an observational study.
B) an experiment, but not a double blind experiment
C) a double blind experiment.
D) a matched pairs experiment.

Quesstion 11) Which of the following statements is FALSE?

A) Nonresponse can cause bias in surveys because non-respondents often tend to behave differently from people who respond.
B) Slight changes in the wording of questions can make a measurable difference to survey results.
C) People will sometimes answer a question differently for different interviewers.
D) Sophisticated statistical methods can always correct the results of undercoverage (when some groups in the population are left out of the process of choosing the sample).

Please explain the answers i would like to learn

Solution

At a local health club, a researcher samples 75 people whose primary exercise is cardiovascular and 75 people whose primary exercise is strength training. The researcher’s objective is to assess the effect of type of exercise on cholesterol. Each subject reported to a clinic to have their cholesterol measured. The subjects were unaware of the purpose of the study, and the technician measuring the cholesterol was not aware of the subject’s type of exercise

A) an observational study.

C) People will sometimes answer a question differently for different interviewers.- False.