A grocery store has an average sales of $8000 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 100 days of sales was selected. It was found that the average was $8200 per day. From past information, it is known that the standard deviation of the population is $1500. The correct null hypothesis for this problem is
A) μ ≤ 8000.
B) μ ≤ 8200.
C) μ = 8000.
D) μ 8200.

Question

A grocery store has an average sales of $8000 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 100 days of sales was selected. It was found that the average was $8200 per day. From past information, it is known that the standard deviation of the population is $1500. The correct null hypothesis for this problem is
A) μ ≤ 8000.
B) μ ≤ 8200.
C) μ = 8000.
D) μ > 8200.

Quizplus · Accepted Answer

The Answer of A grocery store has an average sales of $8000 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 100 days of sales was selected. It was found that the average was $8200 per day. From past information, it is known that the standard deviation of the population is $1500. The correct null hypothesis for this problem is
A) μ ≤ 8000.
B) μ ≤ 8200.
C) μ = 8000.
D) μ > 8200.

A Grocery Store Has an Average Sales of $8000 Per