A random sample of 1,562 undergraduates enrolled in marketing courses wasasked to respond on a scale from one (strongly disagree) to seven (strongly agree) to the proposition: "Advertising helps raise our standard of living." The sample mean response was 4.27 and the sample standard deviation was 1.32. Test the following hypothesis:

H0: = 4

H1: 4

Use = 0.05Use two tailed test.