An Oil Change Shop Claims That They Will Change Your

question 58

Essay

An oil change shop claims that they will change your oil in under 15 minutes. To test this
claim, a consumer advocacy group takes a simple random sample of 10 customers and records
the number of minutes it took to complete oil changes for these customers. Assume that oil
change times are normally distributed. $$\begin{array} { | c | } \hline \text { Minutes for Oil Change } \\\hline 8 \\\hline 2 \\\hline 7 \\\hline 12 \\\hline 14 \\\hline 11 \\\hline 25 \\\hline 8 \\\hline 43 \\\hline 15 \\\hline\end{array}$$ Conduct a hypothesis test for the oil shop's claim about oil change times at the 5% level of
significance.
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Definitions:

Communication

The process of transferring information, ideas, and feelings between two or more people through verbal or non-verbal means.

Weber And Rinne Test

Audiological tests that assess hearing loss by comparing air conduction to bone conduction using tuning forks.

Otoscope

An instrument used to examine the ears.

Sensory Deprivation

A condition in which an individual receives less than normal sensory input, often used in experiments, therapy, or as a form of torture.