A supermarket chain wants to determine the difference the proportion of morning shoppers who are man and the proportion of evening shoppers who are men. A random sample of 400 morning shoopers showed that 48 were men. A random sample of 480 evening shoppers showed 187 were men. Constuct and explain a 95% confidence interval estimate of the difference in the proportion of morning and evening shoppers who are men.© BrainMass Inc. brainmass.com June 4, 2020, 2:14 am ad1c9bdddf
Please see the attached files.
Z Test for Differences in Two Proportions
Hypothesized Difference 0
Level of Significance 0.05
Number of Successes 48
The expert estimates the difference in the proportion of morning and afternoon.