A Random Sample of 100,000 Credit Sales in a Department

question 73

Multiple Choice

A random sample of 100,000 credit sales in a department store showed an average sale of $87.25. From past data, it is known that the standard deviation of the population is $20.00. What is the 95% confidence interval of the population mean?

• A) $87.22 to $87.28
• B) $87.13 to $87.37
• C) $19.97 to $20.03
• D) $19.88 to $20.12

---

Definitions:

Intelligence Quotients

A measure of a person's intellectual abilities in relation to an average score, typically assessed through standardized tests.

Divergent Problem Solving

An approach to problem-solving that explores multiple possible solutions rather than focusing on a single answer.

Heuristic Usage

The use of practical methods or strategies in problem-solving, decision making, and discovery that are not guaranteed to be optimal, perfect, or rational, but are sufficient for reaching immediate goals.

Creative Thinking

The ability to think in new and innovative ways to solve problems or generate original ideas.