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1. A taxi company claims that its drivers have an average of 12.4 yea.pdf

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1. A taxi company claims that its drivers have an average of 12.4 years' experience. In a study of 15 taxi drivers, the average experience was 11.2 years with a standard deviation of 2. At alpha =0.10, is the number of years' experience of the taxi drivers really less than the taxi company claimed? a) What parameter are you testing (mean, proportion, variance)? b) Is this a one tail or two tail test? c) State the null and alternative hypothesis. d) Draw the curve and identify your critical values. e) Convert your sample statistic into a test statistic and plot it on your curve. f) Do you accept or reject the null hypothesis? g) Is there a chance for a type I or type II error?.

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1. A taxi company claims that its drivers have an average of 12.4 years' experience. In a study of 15 taxi drivers, the average experience was 11.2 years with a standard deviation of 2. At alpha =0.10, is the number of years' experience of the taxi drivers really less than the taxi company claimed? a) What parameter are you testing (mean, proportion, variance)? b) Is this a one tail or two tail test? c) State the null and alternative hypothesis. d) Draw the curve and identify your critical values. e) Convert your sample statistic into a test statistic and plot it on your curve. f) Do you accept or reject the null hypothesis? g) Is there a chance for a type I or type II error?

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