Question

In: Statistics and Probability

Construct a confidence interval for ?? the mean of the differences d for the population of...

Construct a confidence interval for ?? the mean of the differences d for the population of paired data. Assume that the population of paired differences is normally distributed. The table shows the weights of 9 subjects before and after following a particular diet for two months. Construct a 99% confidence interval for the mean difference of the “before” minus “after” weights. Round to one decimal place.

Subject

A

B

C

D

E

F

G

H

I

Before

168

180

157

132

202

124

190

210

171

After

162

178

145

125

171

126

180

195

163

Solutions

Expert Solution

Find sample size, mean and standard deviation from both before and after data:

Formula Ref:

99% Confidence interval mean difference:

a 99% confidence interval for the mean difference of the “before” minus “after” weights are (-27.1, 46.9)


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