A Consultant Is Planning a Survey of Corporate Executives to Determine

question 131

Essay

A consultant is planning a survey of corporate executives to determine their mean amount of weekly work time. A pilot survey indicated that the mean work time per week is 50 hours, with a standard deviation of 10 hours. The consultant wants to estimate the mean weekly work time within five hours. The 95% level of confidence is to be used. How many executives should be surveyed?

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Definitions:

Average Score

The numerical average obtained by dividing the sum of all scores by the number of scores.

T Test

A statistical analysis method that evaluates if there's a significant difference between the average values of two distinct groups.

Null Hypothesis

A hypothesis that suggests there is no statistical significance in a set of given observations, serving as a default position until evidence suggests otherwise.

Research Hypothesis

A specific, testable prediction about the outcome of a scientific study based on theory or prior research.