Exhibit 16

question 24

Multiple Choice

Exhibit 16.5 A researcher wished to estimate the proportion of all families who go to the movies at least once a month.He wished the estimate to be accurate within plus or minus 4 percentage points and further desired a 95 percent confidence interval (z = 2) around the result.Additionally,he estimates the population proportion as 0.30.
Refer to Exhibit 16.5.The required sample size is

• A)24.
• B)525.
• C)300.
• D)600.
• E)575.

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Definitions:

Standard Deviation

Standard deviation is a statistical measure quantifying the amount of variation or dispersion from the average in a set of data.

Control Limits

The boundaries in a control chart within which a process metric is considered to be in a state of control; exceeding these limits signals a potential problem or variability.

Sample Range

The difference between the largest and smallest values in a statistical sample, used as a measure of statistical dispersion or variability.

Sample Size

The number of observations or data points that are selected from a larger population for the purpose of statistical analysis.