Construct a 90% Confidence Interval for the Population Mean $\mu _ { . }$

question 48

Multiple Choice

Construct a 90% confidence interval for the population mean, $\mu _ { . }$ Assume the population has a normal distribution. In a recent study of 22 eighth graders, the mean number of hours per week that they watched
Television was 19.6 with a standard deviation of 5.8 hours.

• A)(17.47, 21.73)
• B)(18.63, 20.89)
• C)(5.87, 7.98)
• D)(19.62, 23.12)

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Definitions:

Nominal Wages

The amount of money paid to employees without adjustment for inflation, reflecting the face value rather than the real purchasing power.

Real Wages

The buying capacity of earnings, when accounted for inflation, showing the amount of goods and services that can be purchased.

CPI

The Consumer Price Index is an indicator that calculates the overall average prices of a selection of consumer items and services, including food, transportation, and healthcare, which is utilized to measure inflation.

Winner-Take-All Markets

Markets in which the top performers are able to capture a very large share of the rewards, and the rest are left with very little.