EspañolManagers at an automobile manufacturing plant would like to examine the mean completion time, u, of an assembly line operation. The past data indicate thatthe mean completion time is 43 minutes, but the managers have good reason to believe that this value has decreased. The managers plan to perform astatistical test.After choosing a random sample of assembly line completion times, the managers compute the sample mean completion time to be 40 minutes. The standarddeviation of the population of completion times can be assumed not to have changed from the previously reported value of 3 minutes.Based on this information, complete the parts below.(a) What are the null hypothesis H. and the alternative hypothesis H. that should be used for the test?Ho :0AaO

Given that the mean assembly time is 43 minutes with standard deviation of 3 minutes. A random…

Answered: Managers at an automobile manufacturing…

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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A sample of 76 female workers and another sample of 48 male workers from a state produced mean weekly earnings of $743.50 for the females and $777.63 for the males. Suppose that the population standard deviations of the weekly earnings are $80.05 for the females and $88.68 for the males. The null hypothesis is that the mean weekly earnings are the same for females and males, while the alternative hypothesis is that the mean weekly earnings for females is less than the mean weekly earnings for males. Directions: • Label your answers with the correct statistical symbols. • If you use the Ti, identify which function and values you used to calculate. If you solve by hand, show all steps 2.5 The significance level for the test is 1%. What is/are the critical value(s)? 2.6. What is the value of the test statistic, rounded to three decimal places? 2.7. What is the p-value for this test, rounded to four decimal places? 2. 8. Using the p-value approach, do you reject or fail to reject the null…
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The distribution of the student heights at a large college is approximately bell shaped. If the mean height is 66 inches,and approximately 95% of the heights fall between 32 and 100 inches, then, the standard deviation of the heightdistribution is approximately equal to
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