quiz 06

Question 1

1. The manufacturer of a refrigerator system for beer kegs produces refrigerators that are supposed to maintain a true mean temperature, μ, of 48°F, ideal for a certain type of German pilsner. The owner of the brewery does not agree with the refrigerator manufacturer, and claims he can prove that the true mean temperature is incorrect.

   A.

   H0: μ ≥ 48°H1: μ < 48°

   B.

   H0: μ ≤ 48°H1: μ > 48°

   C.

   H0: μ = 48° H1: μ ≠ 48°

   D.

   H0: μ ≠ 48°H1: μ = 48°

3 points  

Question 2

1. Carter Motor Company claims that its new sedan, the Libra, will average better than 32 miles per gallon in the city. Assuming that a hypothesis test of the claim has been conducted and that the conclusion is to reject the null hypothesis, state the conclusion in nontechnical terms.

   A.

   There is not sufficient evidence to support the claim that the mean is greater than 32 miles per gallon.

   B.

   There is sufficient evidence to support the claim that the mean is greater than 32 miles per gallon.

   C.

   There is not sufficient evidence to support the claim that the mean is less than 32 miles per gallon.

   D.

   There is sufficient evidence to support the claim that the mean is less than 32 miles per gallon.

4 points  

Question 3

1. Find the critical value or values of based on the given information.  

   A.

   31.526

   B.

   8.231

   C.

   7.015

   D.

   8.907

3 points  

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