A samll town installed a Blue streetlights, in part, to help reduce crime in particular areas. The city collected the number of property crimes along nine randomly selected streets in the month before and after the Blue light installation, and claims that crime has been reduced. The number of crime data is shown in the table. No before Blue Light After Blue Light 1 17 14 2 25 20 3 10 14 4 14 12 5 16 8
A samll town installed a Blue streetlights, in part, to help reduce crime in particular areas. The city collected the number of property crimes along nine randomly selected streets in the month before and after the Blue light installation, and claims that crime has been reduced. The number of crime data is shown in the table. No before Blue Light After Blue Light 1 17 14 2 25 20 3 10 14 4 14 12 5 16 8
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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A samll town installed a Blue streetlights, in part, to help reduce crime in particular areas. The city collected the number of property crimes along nine randomly selected streets in the month before and after the Blue light installation, and claims that crime has been reduced.
The number of crime data is shown in the table.
No | before Blue Light | After Blue Light |
1 | 17 | 14 |
2 | 25 | 20 |
3 | 10 | 14 |
4 | 14 | 12 |
5 | 16 | 8 |
6 | 34 | 35 |
7 | 32 | 27 |
8 | 21 | 18 |
9 | 14 | 12 |
a. Specify the competing hypotheses to test the s,all town's claim.
b. Calculate the value of the relevant test statistic and find the critical value at the 5% significance level.
c. Does the evidence support the small town's claim at the 5% significance level?
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