SOLUTION: A study was conducted to determine weight loss, body composition, etc. in obese women before and after 12 weeks of treatment with a very-low-calorie diet: (05 Marks) Before After

Question 1195831: A study was conducted to determine weight loss, body composition, etc. in obese women before and after 12 weeks of treatment with a very-low-calorie diet: (05 Marks)
Before After
85 86
95 90
75 72
110 100
81 75
92 88
83 83
94 93
88 82
105 99
We wish to know if these data provide sufficient evidence to allow us to conclude that the treatment is effective in causing weight reduction in obese women at . Solve using five step critical - value approach.

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
Ho: Change is 0
Ha: Change is not 0
alpha=0.05 p{reject Ho|Ho true}
test is a paired t (0.975, df=9) critical value |t| > 2.262
values
mean is 4
s=3.33
t=difference/s/sqrt(n)
=4/3.333/sqrt(10)
=3.798
Reject Ho; the mean difference is positive, not 0, and there is a significant difference in the treatment to cause weight loss. p-value=0.004.
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