The sales of a grocery store had an average of 8,000 per day. The ...

[londonang]

The sales of a grocery store had an average of 8,000 per day. The store introduced several advertising campaigns in order to increase sales. To determine whether or not the advertising campaigns have been effective in increasing sales, a sample of 64 days of sales was selected. It was found that the average was 8,300 per day. From past information, it is known that the standard deviation of the population is 1,200 . The p-value is
 a. 2.00
  b. 0.9772
  c. 0.0228
  d. 0.5475

Question 2

The sales of a grocery store had an average of 8,000 per day. The store introduced several advertising campaigns in order to increase sales. To determine whether or not the advertising campaigns have been effective in increasing sales, a sample of 64 days of sales was selected. It was found that the average was 8,300 per day. From past information, it is known that the standard deviation of the population is 1,200 . The value of the test statistic is
 a. 250
  b. 8000
  c. 8250
  d. 2.0

[bobsmith]

Answer to Question 1

C

Answer to Question 2

D

[londonang]

Gracias!

[Viet Thy]

Excellent