A car manufacturer claims that the variance of the gas mileage in a model of it...
A car manufacturer claims that the variance of the gas mileage in a model of it new release self-driving car is more than 0.24. You work for consumer advocacy group and are responsible for testing this claim. you sampled 23 vehicles and came up with a variance of 0.17 instead. At alpha = 0.1, is there enough evidence to reject the claim? Assume test scores are normally distributed.
Homework Answers
Ans:
Test statistic:
Chi square=(23-1)*0.17/0.24=15.583
df=23-1=22
p-value=CHIDIST(15.583,22)=0.8360
As,p-value>0.1,we fail to reject the null hypothesis.
There is not sufficient evidence to support the claim that the variance of the gas mileage in a model of it new release self-driving car is more than 0.24
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