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

question 64

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 observed value of chi-square is ________.

• A) 28.00
• B) 30.00
• C) 56.00
• D) 60.00
• E) 65.00

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Definitions:

Neutrophils

A type of white blood cell that plays a key role in the immune system by defending the body against infection.

Macrophages

Immune cells that engulf and digest cellular debris, foreign substances, microbes, and cancer cells in a process called phagocytosis.

Innate Immunity

The first line of defense in the immune system, consisting of physical, chemical, and cellular defenses against pathogens that are present from birth.

Plasma Cell

Cell derived from B cells; produces antibodies.