Question
a company claims that the mean battery lifeof their phone is at least 30 hrs. you suspect this claim is incorrect and find that a
a company claims that the mean battery lifeof their phone is at least 30 hrs. you suspect this claim is incorrect and find that a random sample of 49 phones has a mean battery life of 29.4 hrs and a standard deviation of 1.4 hrs. is there sufficient evidence to show the company's claim is incorrect at 0.05 significance level based on sample?
what is Ho?
what is Ha?
what is the decision based on critical value method ?
what is the test statistic based on sample?
what is the decision based on p-value method?
what is the definition for p-value in this question
what is p-value?
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Algebra And Trigonometry, Enhanced
Authors: Cynthia Y Young
4th Edition
1119320860, 9781119320869
