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Tudor brand car batteries are sold with the claim that they will last for at least...

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Basic Math

  1. Tudor brand car batteries are sold with the claim that theywill last for at least 4 years. Weibang, having boosted his car(with a 3.5-year-old Tudor battery) many times this past winter,believes that the mean battery life is less than four years. Arandom sample of eight batteries was taken. The batteries wereoperational for the following time periods (months): 40, 41, 52,48, 44, 47, 45, 43. (s =3.9 months). At the 5% significance level,can Weibang support his claim that Tudor batteries last less thanfour years?

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3.6 Ratings (360 Votes)
Sample size n 8The batteries were operational for the following time periodsmonths 40 41 52 48 44 47 45 43The batteries were operational for    See Answer
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