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*Chapter 10, Section 10.3, Problem 031 An insurance company wants to know if the average speed at which men drive cars is higher than that of women drivers_ The com...

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*Chapter 10, Section 10.3, Problem 031 An insurance company wants to know if the average speed at which men drive cars is higher than that of women drivers_ The company took random sampl of 26 cars driven by men on highway and found the mean speed to be 71 miles per hour with standard deviation of 1.95 miles per hour; Another sample of 16 cars driven by women on the same highway gave mean speed of 68 miles per hour with standard deviation of 2.35 miles per hour Assume that the speeds at which al

*Chapter 10, Section 10.3, Problem 031 An insurance company wants to know if the average speed at which men drive cars is higher than that of women drivers_ The company took random sampl of 26 cars driven by men on highway and found the mean speed to be 71 miles per hour with standard deviation of 1.95 miles per hour; Another sample of 16 cars driven by women on the same highway gave mean speed of 68 miles per hour with standard deviation of 2.35 miles per hour Assume that the speeds at which all men and all women drive cars on this highway are both normally distributed with unequal population standard deviations Let /1 be the mean speed of cars driven by all men on highway, and //z be the mean speed of cars driven by all women on the same highway: Construct 95% confidence interva) for the difference between the mean speeds of cars driven by all men and all women on this highway: Round your answers to two decimab places_ miles per hour Test at 29 significance level whether the mean speed of cars driven by all men drivers on this highway is higher than that of cars driven by all women drivers_ We can conclude that the mean speed of cars driven by all men drivers on this highway is that of cars driven by all women drivers_ Suppose that the sample standard deviations were 1.55 and 3.25 miles per hour; respectively. Redo parts and Discuss any changes in the results_ Round your answers to two decimal places_ The new confidence interval miles per hour We can conclude that the mean speed of cars driven by all men drivers on this highway is that of cars driven by all women drivers Because the standard error and critical values are both hypothesis test the confidence interval The conclusion for the

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