Use the Given Degree of Confidence and Sample Data to Construct

question 55

Multiple Choice

Use the given degree of confidence and sample data to construct a confidence interval for the population mean $\mu$ Assume that the population has a normal distribution.
Thirty randomly selected students took the calculus final. If the sample mean was 95 and the standard deviation was 6.6 , construct a 99% confidence interval for the mean score of all students.

• A) \(91.68 < \mu < 98.32\)
• B) \(91.69 < \mu < 98.31\)
• C) \(92.95 < \mu < 97.05\)
• D) \(92.03 < \mu < 97.97\)

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Definitions:

Disposable Income

The cash reserves left for households to spend and save after paying income taxes.

Disposable Income

Funds households have for saving and spending following the deduction of income taxes.

Disposable Income

Disposable income for households after accounting for income taxes, meant for spending and saving.

Marginal Propensity

The ratio of change in an economic variable, such as consumption or saving, to a change in another variable, like income.