If the average sales in the last 4 years was 28,000 with a standard deviation of 5,000. If you choose to

1-If the average sales in the last 4 years was 28,000 with a standard deviation of 5,000. If you choose to sample the last 4 weeks of the year scored an average of 29,800. The critical value of the test is:

a. 2.33

b. -2.33

c. .54

2-Using question #1, the significance level was set for the hypothesis test is0.01.

3-A manager of an electronics store wants to know if the average sales in the Christmas season is over $ 30.000 per week. The null hypothesis to be formulated to perform the hypothesis test is:

a. Ho< 30,000

b. Ho = 30,000

c. Ho = 40,000

4-If the average sales in the last 4 years was 28,000 with a standard deviation of 5,000. If you choose to sample the last 4 weeks of the year scored an average of 29,800. The statistic to utilize for the test is

a.µ

b.z

c. t