According to a National Survey, the Average Commuting Time for People

question 97

Multiple Choice

According to a national survey, the average commuting time for people who commute to work is 19.0 minutes. Suppose a researcher wants to test this claim. Taking a random sample of 20 commuters, the researcher calculates a mean time of 19.346 minutes and a standard deviation of 2.842 minutes.
-The null and alternative hypotheses to test the claim is _____.

• A)H₀: ? = 19 vs.H_a: ? ? 19
• B)H₀: ? ? 19 vs.H_a: ? < 19
• C)H₀: ? ? 20 vs.H_a: ? < 20
• D)H₀: ? ? 19 vs.H_a: ? = 19
• E)H₀: ? ? 19 vs.H_a: ? > 19

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Definitions:

Type I Error

The statistical mistake of rejecting a true null hypothesis, also known as a "false positive" finding in hypothesis testing.

Genetic Mutation

A permanent alteration in the DNA sequence that makes up a gene, resulting in a variation that may affect an organism's traits.

Male Fireflies

The male members of the firefly species, known for their bioluminescence used in mating displays to attract female fireflies.

Power

In statistics, the probability of correctly rejecting the null hypothesis when it is false.