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

Question

3 A recent national survey found that high school students watched an average (mean) of 6.7 movies per month with a population standard deviation of 0.6. The distribution of number of movies watched per month follows the normal distribution. A random sample of 47 college students revealed that the mean number of movies watched last month was 5.8. At the 0.05 significance level, can we conclude that college students watch fewer movies a month than high school students? nts a. State the null hypothesis and the alternate hypothesis. b. State the decision rule. here to search

Explanation / Answer

Solutiona:

it is given fewer

so its a left tail test.

Ho: >=6.7,

H1:<6.7

OPTIONA

Solutionb:

Reject Ho,if z<-1.645

Solutionc:

z=samplemean-popmean/samplesd/sqrt(n)

=5.8-6.7/0.6/sqrt(47)

z=-10.28

test statistic:-10.28

Solutiond:

Reject Ho

SOlutione:

p value=0.0000

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