The US Post Office Is Interested in Estimating the Mean Weight

question 158

Multiple Choice

The U.S. Post Office is interested in estimating the mean weight of packages shipped using the overnight service. They plan to sample 300 packages. A pilot sample taken last year showed that the standard deviation in weight was about 0.15 pound. If they are interested in an estimate that has 95 percent confidence, what margin of error can they expect?

• A) Approximately 0.017 pound
• B) About 0.0003 pound
• C) About 1.96
• D) Can't be determined without knowing the population mean.

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Definitions:

Federal Reserve

The central banking system of the United States, responsible for monetary policy, regulation of financial institutions, and maintenance of financial stability.

Check Clearing

The process by which money is transferred from the checking accounts of the writers of checks to the checking accounts of the recipients of the checks.

Insuring Bank Deposits

A government or independent institution's act of providing a guarantee to bank depositors that their deposits will be protected up to a certain limit in the event of a bank failure.

Time Deposits

Time Deposits are savings accounts or certificates of deposit (CDs) that lock the depositor's funds for a certain period of time, during which early withdrawal incurs penalties.