All 423 Wisconsin Public Schools Were All Given a Rating

question 51

Essay

All 423 Wisconsin public schools were all given a rating by the Wisconsin Department of Public Instruction based on several variables. The mean rating reported was 71.5 and the standard deviation was 4.87. To do a follow-up study a random sample of 40 schools was selected. In this sample, the mean rating was 70.9. One of the researchers is alarmed, thinking the report may have been mistaken. Do you think this sample result is unusually low? Explain.

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Definitions:

Sales Expenses

Sales expenses are the costs incurred directly or indirectly from selling a product or service, including commissions, advertising, and distribution costs.

Productive Number

A metric or figure that represents the effectiveness or efficiency of a process, often used in the context of business or production analytics.

Nonselling Time

Periods within a salesperson's schedule that are not directly devoted to selling activities, such as administrative tasks or travel.