The Supervisor of an Automobile Sales and Service Industry Would

question 89

Essay

The supervisor of an automobile sales and service industry would like the variance of the number of automobiles serviced not to exceed 5 units-squared.He would recruit one more service executive if the variance exceeds this threshold.In a recent random sample of 14 services,he computes the sample standard deviation as 3.3.He believes that the automobile services are normally distributed.
A)State the null and the alternative hypotheses to test if the threshold has been crossed.
B)Use the critical value approach to conduct the test at α = 0.01.
C)What should the supervisor do?

• A)State the null and the alternative hypotheses to test if the threshold has been crossed.
• B)Use the critical value approach to conduct the test at α = 0.01.
• C)What should the supervisor do?

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Definitions:

Reuptake

A process by which neurotransmitters are reabsorbed by a neuron after being released into the synaptic cleft, influencing neural communication.

Norepinephrine

A neurotransmitter and hormone involved in the body's fight or flight response, also implicated in mood regulation.

Serotonin

A neurotransmitter that plays a key role in regulating mood, sleep, appetite, and digestion.

Muscle Mass

The total amount of muscle tissue in an individual's body.