Question

A new diet has begun to gain popularity with college age students. I want to test the diet to determine if it is, in fact, effective at helping students lose weight. I take a sample of 200 students and ask them to participate on the diet for 6-weeks. Each student is weighed at the start of the study. At the end of six weeks, the students weight is measured again. A paired analysis seems appropriate for the data collected. I entered the data into Statistix and the following printout was generated: Paired Test for Beginning - End Null Hypothesis: difference = 0 Alternative Hyp: difference ? 0 Mean 1.1053 Std Error 0.4225 Lower 95% CI 0.2723 Mean - H0 1.1053 Upper 95% CI 1.9384 T 2.62 DF 199 P 0.0096 Cases Included 200 Missing Cases 0 What rejection region would you use if you wanted to determine if the diet was effective at helping students lose weight, on average. Use alpha = .05. Reject Ho if Z > 1.96 or Z < -1.96 Always Reject Ho Reject Ho if Z > 1.645 Reject Ho if Z < -1.645

          A new diet has begun to gain popularity with college age students. I want to test the diet to determine if it is, in fact, effective at helping students lose weight. I take a sample of 200 students and ask them to participate on the diet for 6-weeks. Each student is weighed at the start of the study. At the end of six weeks, the students weight is measured again. A paired analysis seems appropriate for the data collected. I entered the data into Statistix and the following printout was generated:

Paired Test for Beginning - End

Null Hypothesis: difference = 0
Alternative Hyp: difference ? 0

Mean 1.1053
Std Error 0.4225
Lower 95% CI 0.2723
Mean - H0 1.1053
Upper 95% CI 1.9384
T 2.62
DF 199
P 0.0096

Cases Included 200 Missing Cases 0

What rejection region would you use if you wanted to determine if the diet was effective at helping students lose weight, on average. Use alpha = .05.

Reject Ho if Z > 1.96 or Z < -1.96
Always Reject Ho
Reject Ho if Z > 1.645
Reject Ho if Z < -1.645

A new diet has begun to gain popularity with college age students. I want to test the diet to determine if it is, in fact, effective at helping students lose weight. I take a sample of 200 students and ask them to participate on the diet for 6-weeks. Each student is weighed at the start of the study. At the end of six weeks, the students weight is measured again. A paired analysis seems appropriate for the data collected. I entered the data into Statistix and the following printout was generated:

Paired Test for Beginning - End

Null Hypothesis: difference = 0
Alternative Hyp: difference ? 0

Mean 1.1053
Std Error 0.4225
Lower 95% CI 0.2723
Mean - H0 1.1053
Upper 95% CI 1.9384
T 2.62
DF 199
P 0.0096

Cases Included 200 Missing Cases 0

What rejection region would you use if you wanted to determine if the diet was effective at helping students lose weight, on average. Use alpha = .05.

Reject Ho if Z > 1.96 or Z < -1.96
Always Reject Ho
Reject Ho if Z > 1.645
Reject Ho if Z < -1.645

Added by John E.

Question

Please give Ace some feedback