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:

Automotive Engines

The power units of vehicles, designed to convert fuel into mechanical energy to enable motion.

Labor Rate Variance

The difference between the actual labor rate paid and the standard labor rate expected, indicating over or underpayment.

Budget Variance

The difference between the budgeted amount of expense or revenue, and the actual amount of expense or revenue incurred.

Volume Variance

The difference between the budgeted fixed overhead and the applied fixed overhead, which is usually driven by a difference in actual production volume and the expected production volume.