A Sample of 25 Different Payroll Departments Found That the Employees

question 52

Multiple Choice

A sample of 25 different payroll departments found that the employees worked an average of 310.3 days a year. Assume a population standard deviation of 23.8 days. What is the 90% confidence interval for the
Average days worked, $\mu$ of all payroll departments?

• A) \(301.0 < \mu < 319.6\)
• B) \(298.0 < \mu < 322.6\)
• C) \(302.4 < \mu < 318.2\)
• D) \(314.1 < \mu < 316.8\)

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Definitions:

Distribution

In statistics, a way of describing the observations of a variable, including their spread and central tendency.

Perfect Correlation

A statistical relationship where two variables move in sync, either always increasing or decreasing together, represented by a correlation coefficient of +1 or -1.

Negative Correlation

A relationship between two variables in which one variable increases as the other decreases.

Outdoor Activities

Recreational or leisure activities that take place in natural settings, promoting physical health and well-being.