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

question 115

Essay

According to a national survey,the average commuting time for people who commute to a city with a population of 1 to 3 million is 19.0 minutes.Suppose a researcher lives in a city with a population of 2.4 million and wants to test this claim in her city.Taking a random sample of 20 commuters,she calculates a mean time of 19.346 minutes and a standard deviation of 2.842 minutes.Test the hypotheses at α = .10.

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Definitions:

Z Score

A statistical measure that describes a value's relationship to the mean of a group of values, measured in terms of standard deviations from the mean.

Scores

Quantitative values assigned to individuals to represent or measure specific traits or outcomes.

Z Score

A metric that shows how far a value stands from the mean within a collection of values, denoted in units of standard deviations.

Scores

Numerical values assigned to represent the performance, achievement, or characteristics of individuals or items.