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A Work Sampling Study Is Needed That Will Estimate the Percentage

question 61

Essay

A work sampling study is needed that will estimate the percentage of time a postal clerk spends selling stamps as opposed to other duties. Determine the necessary sample size to estimate that proportion with a confidence of 99.74 percent to within 3 percent, for these cases:
(1) No information is currently available concerning that proportion.
(2) The proportion is probably no more than 15 percent.


Definitions:

Percent Decrease

A measure of how much a quantity has decreased in percentage terms compared to its previous value.

Percent Increase

The process of determining the ratio of the increase in a quantity to the original amount, expressed as a percentage.

Stock Value

The price of a single share of a company's stock, representing ownership in the company and its potential profitability.

Interest Rate

The proportion of a loan that is charged as interest to the borrower, typically expressed as an annual percentage of the loan remaining.

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