Question
Electric vehicles are often categorized by the range of miles that can be travelled on a single battery charge, since charging stations are not yet
Electric vehicles are often categorized by the range of miles that can be travelled on a single battery charge, since charging stations are not yet widespread in the United States. The latest model of a certain brand of electric car is reported to have an average range of 250 miles. An auto industry journalist would like to verify this claim, since he believes that the true range of the car may be less than 250 miles. The journalist selected and tested a random sample of 99 cars of this model and found that the average range of the sample was 241.9 miles with a standard deviation of 25.3 miles. Apply the p-value method to test the hypothesis that the average range of this electric car model is less than 250 miles, using =0.025=0.025. State the null and alternative hypothesis for this test. H0:H0:? = > < p = p p p p > p < H1:H1:? = > < p = p p p p > p <
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