A random sample of 172 students was asked to rate on a scale to from 1...

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A random sample of 172 students was asked to rate on a scale tofrom 1 (not important) to 5 (extremely important) health benefitsas a job characteristic (note that the rating scale can also havedecimals, i.e. a student can give a rating of 1.32). The samplemean rating was 3.31, and the sample standard deviation was 0.70.For a type I error of 1% (alpha), can you be reasonably certainthat the average rating is more than 3 in the population?
1)Specify the rejection region forÂ Â = 0.01. Reject H0if
A) z > 2.33
B) t > 2.32
C) z < 2.33
D) t < 2.32
and what is your conclusion.
A soft drink filling machine, when in perfect adjustment, fillsthe bottles with 12 ounces of soft drink. A random sample of 49bottles is selected, and the contents are measured. The sampleyielded a mean content of 11.88 ounces with a standard deviation of0.35 ounces.
2) State the null and alternative hypotheses.
A) H0: Âµ = 0, Ha: Âµ > 11.88
B) H0: Âµ = 0, Ha: Âµ â‰ 11.88
C) H0: Âµ = 0, Ha: Âµ > 12
D) H0: Âµ = 0, Ha: Âµ â‰ 12

Answer & Explanation Solved by verified expert

4.4 Ratings (876 Votes)

1 Since we are going to test for the mean rating and thealternative hypothesis would be if average rating was more than 3Therefore this is a righttailed test Also we do not know See Answer

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