QUESTION 1 1 points Save Ans The manufacturer of a new compact car claims that t

Question

QUESTION 1 1 points Save Ans The manufacturer of a new compact car claims that the car will average at least 35 miles per gallon in For 100 test runs, the car averaged 36.5 miles per gallon with a standard deviation of 4 miles per gallon. Suppose that the manufacturer tests the following hypotheses Ho: = 35 H:H>35 icance level. What s the power of the test f the actual average fuel fficiency is 36 miles per gallon? O a. 88.87796 O b. 99.086% O c. 95.25496 d. 56.749% O e. 80.51196 QUESTION 2 1 points Save Ansv The sales manager of a food company wants to determine if the weekdy sales of 16 ounce packages of frozen broccoli has increased since last yoar. The m weekly number of sales per store was 2,400 packages last year. The sales manager set the following hypotheses to test Ho: = 2400 H1: > 2400 Available sales data are from 400 stores. Assume that this data set is a random sample. The sample mean is 2,470 and the sample standard deviation is 80t For the significance level of 5%, find the critical value. a. 2470 O b. 2321.6 c. 2478.4 (-) d. 2465.6

Explanation / Answer

Question 2: Significant Value : 2470 +1.645*80/sqrt(800) = 2476.58 where 1.645 is critical value of z at 5% los in right tail

correct answer: Option (D)

Question 3:

t Test
Test Statistic, t: -1.7500
Critical t: -1.6604
P-Value: 0.0416

Here P-value < alpha 0.05, so we reject H0

Correct Answer: Option (C)

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