Two groups were selected for an experiment. The sample data is reported: Group A Group B Sample Mean Spending/day ($) 170 150 Sample Standard deviation ($) 10 5 # of Females 9 7 Sample Size 36 42 a. Set up a 99% confidence interval for the mean difference in spending between the two groups. b. At the 10% level test the alternate hypothesis that group B has lower spending level than Group A.
Two groups were selected for an experiment. The sample data is reported:
Group A Group B
Sample
Sample Standard deviation ($) 10 5
# of Females 9 7
a. Set up a 99% confidence interval for the mean difference in spending between the two groups.
b. At the 10% level test the alternate hypothesis that group B has lower spending level than Group A.
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