David Desreumaux,VP of Human Resources of American First Banks (AFB),is $\alpha$

question 37

Multiple Choice

David Desreumaux,VP of Human Resources of American First Banks (AFB) ,is reviewing the employee training programs of AFB banks. Based on a recent census of personnel,David knows that the variance of teller training time in the Southeast region is 8,and he wonders if the variance in the Southwest region is the same number. His staff randomly selected personnel files for 15 tellers in the Southwest Region,and determined that their mean training time was 25 hours and that the standard deviation was 4 hours. Assume that teller training time is normally distributed. Using $\alpha$
= 0.10,the critical values of chi-square are ________.

• A) 7.96 and 26.30
• B) 6.57 and 23.68
• C) -1.96 and 1.96
• D) -1.645 and 1.645
• E) -6.57 and 23.68

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Definitions:

Standard Deviation

A measure of the dispersion or variation in a distribution or set of data, indicating how much individual values differ from the mean.

Coefficient of Variation

A statistical measure of the dispersion of data points in a data series around the mean, expressed as a percentage.

Expected Returns

The anticipated amount of profit or loss an investment is projected to generate.

Risk Aversion

A preference for lower-risk options over higher-risk ones, often seen in the behavior of investors seeking safer investments.