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

question 112

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 correct null hypothesis for this problem is

• A) μ ≤ 8000
• B) μ > 8000
• C) μ = 8000
• D) μ > 8250

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Definitions:

Psychology Midterm

An examination that typically occurs in the middle of an academic term or semester, assessing students' knowledge and understanding of psychological concepts.

Informed Consent

The process by which a fully informed person can participate in choices about their care or participation in research, based on understanding the risks, benefits, and alternatives involved.

Meta-Analysis

A statistical procedure that combines the results of multiple scientific studies to find an overall effect.

Debriefing

A discussion or interview that follows after a task or experiment, often used in psychological studies to explain the purpose and need for the study, and to ensure the well-being of participants.