In crash tests at 5 mph, the mean bumper repair cost for 14 randomly selected small cars is $ 473 with a standard deviation of $ 190. In a similar test of 23 randomly selected midsize cars, the mean bumper repair cost is $ 741 with a standard deviation of $205. At a α = 0.10 can you conclude that the mean bumper repair is less for small cars than it is for midsize cars? Assume the variances are equal. Find the Rejection Region Group of answer choices < -1.645 < -1.282 > 1.282 > 1.645

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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In crash tests at 5 mph, the mean bumper repair cost for 14 randomly selected small cars is $ 473 with a standard deviation of $ 190. In a similar test of 23 randomly selected midsize cars, the mean bumper repair cost is $ 741 with a standard deviation of $205. At a α = 0.10 can you conclude that the mean bumper repair is less for small cars than it is for midsize cars? Assume the variances are equal.

Find the Rejection Region

Group of answer choices
< -1.645
< -1.282
> 1.282
> 1.645
 
 
 
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