After Calculating the Sample Size Needed to Estimate a Population

question 30

Multiple Choice

After calculating the sample size needed to estimate a population proportion to within 0.05,you have been told that the maximum allowable error (B) must be reduced to just 0.025.If the original calculation led to a sample size of 1000,the sample size will now have to be

• A)2000.
• B)4000.
• C)1000.
• D)8000.

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Definitions:

Researchers

Individuals who conduct systematic investigations and exploration into phenomena, questions, or problems using scientific methods.

Population Average

The mean value of a trait or characteristic within an entire population.

Sample Mean

The average of all the data points in a sample, used as an estimate of the population mean.

Square Root

The square root of a number is a value that, when multiplied by itself, gives the original number.