Provide an Appropriate Response $\$ 157$ With a Standard Deviation Of $\$ 38$

question 51

Short Answer

Provide an appropriate response.
-In a random sample of 26 laptop computers, the mean repair cost was $\$ 157$ with a standard deviation of $\$ 38$ . Assume the population has a normal distribution.
a) Construct a $95 \%$ confidence interval for the population mean, $\mu$ .
b) Suppose you did some research on repair costs for laptop computers and found that the standard deviation is $\sigma = 38$ . Use the normal distribution to construct a $95 \%$ confidence interval for the population mean, $\mu$ . Compare the results.

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Definitions:

Scoring Rubric

A set of criteria used for assessing or grading performances, products, or responses.

Critical Thinking

Conducting an objective scrutiny and appraisal of an issue with the goal of forming an evaluation.

Critical Thinking

A thorough investigation and evaluation of a case for the purpose of making an evaluation.

Stubborn

Showing dogged determination not to change one's attitude or position on something, especially in spite of good arguments or reasons to do so.