Exhibit 12-6 The Owner of a Car Wash Wants to See If

question 49

Multiple Choice

Exhibit 12-6
The owner of a car wash wants to see if the arrival rate of cars follows a Poisson distribution. In order to test the assumption of a Poisson distribution, a random sample of 150 ten-minute intervals was taken. You are given the following observed frequencies:
-Refer to Exhibit 12-6. At 95% confidence, the conclusion of the test is that the

• A)arrival of cars follows a Poisson distribution
• B)arrival of cars does not follow a Poisson distribution
• C)test is inconclusive
• D)None of these alternatives is correct.

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Definitions:

Nonparametric Procedure

A nonparametric procedure refers to a type of statistical analysis that does not rely on data belonging to any particular distribution, suitable for ordinal data or when the data's distribution is unknown.

Kruskal-Wallis Test

An analytical method not predicated on parameters for assessing statistically significant disparities among two or more groups related to an independent variable in relation to a dependent variable that is either continuous or ordinal.

Kruskal-Wallis Test

A nonparametric method for testing whether samples originate from the same distribution, used for comparing more than two samples that are independent.

Two-tail Wilcoxon Rank Sum Test

A nonparametric hypothesis test evaluating whether two independent samples come from the same distribution, considering extreme values at both ends.