A Researcher Wishes to Determine the Difference in Two Population

question 30

Multiple Choice

A researcher wishes to determine the difference in two population means.To do this, she randomly samples 9 items from each population and computes a 90% confidence interval.The sample from the first population produces a mean of 780 with a standard deviation of 240.The sample from the second population produces a mean of 890 with a standard deviation of 280.Assume that the values are normally distributed in each population.The t value used for this is ___.

• A)1.860
• B)1.734
• C)1.746
• D)1.337
• E)2.342

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Definitions:

Machine-Hours

A unit of measure indicating the total time production machinery is operated, used in calculating manufacturing costs and efficiencies.

Cost of Work

This could refer to the total expenses associated with performing a particular job or task, including labor, materials, and overhead costs.

Overapplied Overhead

A scenario in which the overhead costs assigned surpass the real overhead expenses incurred.

Allocation

The process of assigning costs or resources to various departments, products, or activities based on specific criteria.