David Desreumaux, VP of Human Resources of Maritime Boat Manufacturing $\alpha$

question 58

Multiple Choice

David Desreumaux, VP of Human Resources of Maritime Boat Manufacturing (MBM) , is reviewing the employee training programs of MBM factories.Based on a recent census of personnel, David knows that the variance of worker training time in New Brunswick is 8, and he wonders if the variance in Nova Scotia is the same number.His staff randomly selected personnel files for 15 workers in Nova Scotia, and determined that their mean training time was 25 hours and that the standard deviation was 4 hours.Assume that worker training time is normally distributed in the population.Using $\alpha$ = 0.10, the null hypothesis is ___.

• A)\(\mu\) = 25
• B)\(\sigma\)² = 8
• C)\(\sigma\)² = 4
• D)\(\sigma\)² \(\le\) 8
• E)s² = 16

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Definitions:

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The tenth cranial nerve that innervates digestive organs, heart and other areas, and is part of the parasympathetic nervous system.

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Permeability barrier controlling the passage of most large-molecular compounds from the blood to the cerebrospinal fluid and brain tissue; consists of capillary endothelium and may include the astrocytes.

Caffeine

A stimulant found in coffee, tea, chocolate, and certain medications that can enhance alertness and reduce feelings of tiredness.