Purchase Solution

Z test for proportion of accidents of Fire trucks data

Not what you're looking for?

Ask Custom Question

In Dallas some fire trucks were painted yellow (instead of red)to heighten their visibility. During a test period the fleet of red fire trucks made 153,348 runs and had 20 accidents, while the fleet of yellow fire trucks made 135,035 runds and had 4 accidents. At a=.01, did the yellow fire trucks have a significantly lower accident rate? a)state the hypothesis B) state the decision rule and sketch it c)find the sample proportions and z test statistic)make a decision e)find the p-value and interpret it f)if statistically significant, do you think the difference is large enough to be important? If so, to whom, and why? g)is the normality assumption fulfilled? Explain.

Attachments
Purchase this Solution

Solution Summary

This solution gives the step by step method for Z test for population proportion for fire trucks problem from the e-text, Applied Statistics in Business and Economics, by Doane and Seward

Purchase this Solution


Free BrainMass Quizzes
Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.