AT&T would like to test the hypothesis that the average revenue per retail user for Verizon Wireless customers equals $50. A...

 AT&T would like to test the hypothesis that the average revenue per retail user for Verizon Wireless customers equals $50. A random sample of 32 Verizon Wireless customers provided an average revenue of $54.70. It is believed that the population standard deviation for the revenue per retail user is $11.00. AT&T would like to set a α=0.05. Use the critical value approach to test this hypothesis.