If the Sample Standard Deviation Is 10

question 45

Multiple Choice

If the sample standard deviation is 10.5 and the sample mean is 48 based on a study with a sample size of 120,the 95 percent confidence interval about the mean is between approximately:

• A)44.37 and 51.63
• B)46.12 and 49.88
• C)47.88 and 48.12
• D)40.0 and 50.0

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Definitions:

Exchange Rate

The ratio at which one nation’s currency can be exchanged for another nation’s currency.

National Rate

A standard or average interest rate, unemployment rate, or other statistical measure that applies across an entire country.