A sample of 150 people was randomly drawn. Each person was identified as a consumer or a non-consumer of high-fiber cereal. For each person the number of calories consumed at lunch was recorded. The data:
able[[ able[[consumer],[of high-fiber cereal]], able[[non-consumer],[of high-fiber cereal]]],[43=n_(1),107=n_(2) Sample Size],[604.02=ar{x} _(1),633.23=ar{x} _(2) Sample Mean],[4103=s_(1)^(2),10670=int_2^2 Sample variance.]]
A- Find a 95% confidence interval estimating the difference of two population means
B- Test whether the mean consumed calories for high-fiber cereal consumers is greater than the mean calories for nonconsumer of high-fiber cereal
A sample of 150 people was randomly drawn. Each person was
cereal. For each person the number of calories consumed at lunch was recorded. The data:
consumer
non-consumer of high-fiber cerealof high-fiber cereal
43=n 26D TOU 604.02=X 633.23-X, Sample Mean lim it 4103=s 10670=Sample variance.
A- Find a 95% confidence interval estimating the difference of two population means . B- Test whether the mean consumed calories for high-fiber cereal consumers is greater than the mean calories for non- consumer of high-fiber cereal