NEED EHLP ASAP!!! THANKS!!!! A researcher studied whether meeting regularly with
ID: 3365121 • Letter: N
Question
NEED EHLP ASAP!!! THANKS!!!!
A researcher studied whether meeting regularly with a weight-loss counselor helps dieters lose weight. Eighty dieters were available for the study Half the dieters, assigned at random, received weight-loss counseling. The other half did not. After six months, the weight lost by each dieter was measured. On the average, those who met regularly with a weight-loss counselor lost more weight than those who did not.
Reference: Ref 5-2
To randomly assign 40 of the 80 dieters to the group receiving counseling, we must first label them, then use the table of random digits. Which of these are correct ways to label?
Label the 80 dieters 01 to 80.
Label the 80 dieters 00 to 79.
Label the 40 dieters in the group receiving counseling 01 to 40.
All three are correct.
(A) and (B) are correct but (C) is not.
A.Label the 80 dieters 01 to 80.
B.Label the 80 dieters 00 to 79.
C.Label the 40 dieters in the group receiving counseling 01 to 40.
D.All three are correct.
E.(A) and (B) are correct but (C) is not.
Explanation / Answer
(A) and (B) are correct but (C) is not.
Labelling just 40 dieters will not result in a random sample. The idea is to label all dieters and be able to randomly select 40 using random digits.
Answer: E.(A) and (B) are correct but (C) is not.
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