You want to compare the daily sales for two different designs of Web pages for your internet business. You assign the next 62 days to either Design A or Design B, 31 days each. The summary statistics for the test are shown in part (d) on the next page. Suppose Design A is the current design and Design B is a proposed new design. The hypothesis is that Design B is superior to Design A.
Would you use a one-sided or two-sided test for this example. Why?
State the null and alternative hypothesis corresponding to your answer for (a).
What would the critical value be? Use ? = 0.05