In order to estimate the difference between the average daily sales of two branches of a department store, the following data has been gathered.
Downtown Store North Mall Store
Sample size n, = 23 days n2 = 26 days
Sample mean (in $1,000) Xl =37 X2 =34
Sample standard deviation (in $1,000) SI = 4 S2 = 5
Develop a test for the difference between the two population means. Let a = 0.05.