A Researcher Is Interested in Whether Students Who Are Musicians

question 2

Multiple Choice

A researcher is interested in whether students who are musicians have higher intelligence test scores than students in the general population. The researcher predicts that playing a musical instrument is associated with higher intelligence test scores. The researcher selects a sample of 75 musicians from local high schools and gives them an intelligence test. The mean for the sample is 105. The mean for the general population (µ) is 100 with a standard deviation (s) of 15. What is z_obt for this sample?​

• A)0.33
• B)1.89
• C)2.89
• D)3.25

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Definitions:

Standard Cost System

A cost accounting system that applies estimated costs to product costs for setting standards, controlling operations, and identifying variances or differences between actual costs and standard costs.

Direct Labor Costs

The total expense a company incurs for paying employees who are directly involved in the manufacturing of a product or the delivery of a service.

Standard Cost System

A cost accounting system that uses cost estimates for materials, labor, and overhead to assess performance by comparing these standard costs to actual costs incurred.

Work in Process

Inventory comprising goods that are in the production process but not yet completed.