A police chief wants to determine if crime rates are different for four differen

Question

A police chief wants to determine if crime rates are different for four different areas of the city (East(1), West(2), North(3), and South(4) sides), and obtains data on the number of crimes per day in each area. The one-way ANOVA table is shown below. Source of Variation SS df MS F Between groups 87.79 29.26 9.12 Within groups 64.17 20 3.21 151.96 23 Total The p-value for the test is A. between 0.01 and 0.025 B. between 0.025 and 0.05 C. less than 0.01 o D. greater than 0.05 1.0 Points Question 29 of 40 AutoTrader.com would like to test if a difference exists in the age of three different tpes of vehicles currently on the road-trucks, cars, and vans. The following data represent the age of a random sample of trucks, cars, and vans. Trucks Cars Vans 12 3 10 5 Using a 0.05, the conclusion for this hypothesis test would be that because the test statistic is o A, less than the critical value, we can conclude that there is a difference in the average age of trucks, cars, and vans currently on the road. o B. more than the critical value, we cannot condude that there is a difference in the average age of trucks, cars, and vans currently on the road. C, less than the critical value, we cannot conclude that there is a difference in the average age of trucks, cars, and vans currently on the road. D. more than the critical value, we can conclude that there is a difference in the average age of trucks, cars, and vans currently on the road

Explanation / Answer

The p-value would be C. less than 0.01.

29.

Here, FSTAT>FCRIT and hence reject the null hypothesis. Ans would be D. more than the critical value, we can conclude that there is a difference in the average age of trucks, cars and vans currently on the road

28

Hence, correct answer is 5.74.

Anova: Single Factor SUMMARY Groups Count Sum Average Variance Trucks 4 40 10 3.333333 Cars 4 32 8 2 Vans 4 24 6 4.666667 ANOVA Source of Variation SS df MS F P-value F crit Between Groups 32 2 16 4.8 0.038131 4.256495 Within Groups 30 9 3.333333 Total 62 11

Here, FSTAT>FCRIT and hence reject the null hypothesis. Ans would be D. more than the critical value, we can conclude that there is a difference in the average age of trucks, cars and vans currently on the road

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