Exhibit 9-9 the Sales of a Grocery Store Had an Average of Average

question 113

Multiple Choice

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 value of the test statistic is

• A)250
• B)8000
• C)8250
• D)2.0

---

Definitions:

Marine Organisms

Living creatures that inhabit the ocean, ranging from microscopic phytoplankton to large whales, adapted to the marine environment.

Organic Material

Matter derived from living organisms, including plants, animals, and their byproducts, which can decompose into soil.

Calcite

A carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3), commonly found in sedimentary rocks.

Arabian Peninsula

A large, relatively arid peninsula in Western Asia, bordered by the Red Sea, Arabian Sea, and Persian Gulf, consisting of several countries including Saudi Arabia.