A recent national survey found that high school students watched an average (mea

Question

A recent national survey found that high school students watched an average (mean) of 7.8 DVDs per month with a population standard deviation of 1.00 hour. The distribution of DVDs watched per month follows the normal distribution. A random sample of 30 college students revealed that the mean number of DVDs watched last month was 7.30. At the 0.05 significance level, can we conclude that college students watch fewer DVDs a month than high school students? a. State the null hypothesis and the alternate hypothesis. H0: 7.8 ; H1: < 7.8 H0: = 7.8 ; H1: 7.8 H0: > 7.8 ; H1: = 7.8 H0: 7.8 ; H1: > 7.8

Explanation / Answer

Claim : The college students watch fewer DVDs a month than high school students.

(fever than means less than)

So null and alternative hypothesis is

H0: 7.8 ; H1: < 7.8

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