The USPost Office Is Interested in Estimating the Mean Weight of of Packages

question 143

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 pounds.If they are interested in an estimate that has 95 percent confidence,what margin of error can they expect?

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

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Definitions:

Waterfall

A model or process that visually represents the sequential and cumulative effect of a series of transactions or events, often used in project management and finance.

Rest

The remaining part of something, often used when dividing or after subtracting a portion.

Ounces

A unit of weight used primarily in the United States, part of the imperial and US customary systems, equivalent to 28.35 grams.

Gold

a dense, malleable, yellow precious metal that is often used in jewelry, currency, and as an investment.