Question

A recent national survey found that high school students watched an average (mean) of 7.1 DVDs per month with a population standard deviation of 1.00. A random sample of 33 college students revealed that the mean number of DVDs watched last month was 6.20. At the .05 significance level, can we conclude that college students watch fewer DVDs a month than high school students?

1.) State the decision rule.

a.) Reject H₀ if z > -1.65

b.) Reject H₁ if z < -1.65

c.) Reject H₀ if z < -1.65

d.) Reject H₁ if z > -1.65

2.) What is your decision regarding H0 ?

a.) Cannot reject H₀

b.) Reject H₀

Answer 1

1)decision rule: Reject H₀ if z < -1.65

2 ) Reject H₀