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10 A manufacturer claims that the mean driving cost per mile M of its vehicles...

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10 A manufacturer claims that the mean driving cost per mile M of its vehicles is less than that of its leading competitor You conduct a study using 30 randomly selected vehicles from the manufacturer and 32 from the leading competitor Here are some summary statistics from the study Sex Null Mean 0 48 mi 0 51 mi Manufacturer Competitor State the null and alternative hypotheses in terms of HM Hc Conclusion Standard deviation Alternative 11 What is your conclusion based on the R output below xbar 0 48 sx 0 05 nx 30 ybar 0 51 sy 0 07 ny 32 data 0 05 mi 0 07 mi t 1 9509 df 56 147 p value 0 02803 c Reject the null hypothesis d Fail to reject the null hypothesis 12 For problem 10 what can we conclude at significance level 5 a Reject the alternative hypothesis b Fail to reject the alternative hypothesis

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