A Company Compared the Variance of Salaries for Employees Who

question 121

Essay

A company compared the variance of salaries for employees who have been employed for 5 years or less with employees who have been employed for 10 years or more. They randomly selected 21 employees with 5 years or less experience and 15 employees with 10 years or more experience. The standard deviation for the group with 5 years or less experience was $2,225; the standard deviation for the group with 10 years or more experience was $1,875. Using the 0.05 significance level, what is the decision regarding the null hypothesis?

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Definitions:

Profit Center

A business segment whose manager has control over cost and revenue but has no control over investments in operating assets.

Revenue

The complete sum of revenue a business earns from sales of goods or provision of services within a designated timeframe.

Controlling Costs

The process of monitoring, managing, and regulating expenses to operate within the budget and maximize profitability.

Residual Income

The income that remains after deducting all required costs of capital and operating expenses, indicating the net income generated beyond the minimum rate of return.