A Student Wanted to Construct a 99% Confidence Interval for the Mean

question 1

Multiple Choice

A student wanted to construct a 99% confidence interval for the mean age of students in her statistics class. She randomly selected nine students. Their mean age was 19.1 years with a sample standard deviation of 1.5 years. What is the 99% confidence interval for the population mean?

• A)[17.42,20.78]
• B)[17.48,20.72]
• C)[14.23,23.98]
• D)[0.44,3.80]

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Definitions:

Pegged Exchange Rates

A fixed exchange rate system where a country's currency value is fixed or pegged to another currency, a basket of currencies, or another measure of value.

Orderly Adjustments

Refers to planned and controlled changes in economic policies or conditions aimed at achieving stability or growth without causing undesirable market fluctuations.

Foreign Exchange Market

The foreign exchange market is a global decentralized marketplace for trading currencies, determining the exchange rate for different currencies.

British Pounds

The currency of the United Kingdom, widely used in Great Britain and its territories.