An insurance company wants to know if the average speed at which men drive cars is greater than that of women drivers.The company took a random sample of 27 cars driven by men on a highway and found the mean speed to be 72 miles perhour with a standard deviation of 2.2 miles per hour. Another sample of 18 cars driven by women on the same highwaygave a mean speed of 68 miles per hour with a standard deviation of 2.5 miles per hour. Assume that the speeds at whichall men and all women drive cars on this highway are both normally distributed with the same population standarddeviation. Suppose you must test the hypothesis at 1% level of significance whether the mean speed of cars driven by allmen drivers on this highway is greater than that of cars driven by all women drivers.The test statistic will be:a) 4.123b) 5.501c) -5.501d) -4.123

Givenn1=27Mean(x1)=72s1=2.2n2=18x2=68s2=2.5α=1%

Answered: An insurance company wants to know if…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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