29)The U.S. Census Bureau data show that the mean household income in the area served by a shopping mall is $42,500 per year. Some market research firm questions shoppers at the mall. The researchers suspect the mean household income of mall shoppers is higher than that of the general population. What are the null and alternative hypotheses?)

31) A test of the null hypothesis H₀: = ₀ gives test statistic z = 1.90. Our significance level is = 0.05.

a.What is the p-value if the alternative is H_A: > ₀? Do you reject the null hypothesis?

b.What is the p-value if the alternative is H_A: ₀? Do you reject the null hypothesis?