A Trucking Firm Suspects That the Variance for a Certain $\alpha$

question 60

Essay

A trucking firm suspects that the variance for a certain tire is greater than 1,000,000. To check the claim, the
firm puts 101 of these tires on its trucks and gets a standard deviation of 1200 miles. If α $\alpha$ = 0.05, test the
trucking firmʹs claim using confidence intervals.

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Definitions:

Quota Sampling

A sampling method where the selection of participants is based on pre-specified characteristics or quotas to ensure representation.

Nonprobability Sampling

A sampling technique where the samples are gathered in a process that does not give all the individuals in the population equal chances of being selected.

Simple Random Sampling

A sampling method where each member of a population has an equal chance of being selected, minimizing bias in the sample collected.

Exit Polling

A survey of voters taken immediately after they have exited the polling stations, primarily used to predict election outcomes before the official count.