What is the standard error

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A transportation commission studies driving times between two cities to determine whether the construction of a new highway reduced commute times. Times for 40 cars driving on the old highway and times for 50 cars driving on the new highway are obtained. A summary of the data obtained from the study is given below.

Highway Mean commute times Population standard deviation

1 (Old) 5.35 0.5

2(New) 4.95 0.8

1) What is the standard error? (#.###)

2) What is the z-score? (#.###)

3) What is the p -value? (#.######)

4) Should the null hypothesis that the mean commute time for the old highway is equal to the mean commute time for the new highway be rejected at the α=0.05  significance level using the output below? Yes or no?

Reference no: EM132980734

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