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Exhibit 9-9 The sales of a grocery store had an average of $8,000 per day. The...

Exhibit 9-9
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.

Refer to Exhibit 9-9. The p-value is

a)

2.00

b)

0.9772

c)

0.0228

d)

0.5475
Math   Statistics-And-Probability   
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