Your engineering position requires frequent travel to the westcoast, typically through Chicago. In reviewing historical airlinedata, you have determined that over the last year flights intoChicago on Southwest have been normally distributed, arrivingan average of 73 minutes late with a standard deviation of 10.2minutes. Yesterday, a travel agent informed you that Southwestrecently changed their scheduling into Chicago that may haveimpacted arrival times. To confirm this claim, you collect thearrival times for a random sample of 48 Southwest flightsarriving into Chicago, and find a sample mean of 70.3 minutesand a sample standard deviation of 7.2 minutes.A) Has there been a change in the mean arrival times onSouthwest? Report the null and alternate hypothesis, as well asthe corresponding P-value.Ho : μ isH₁:μ is~ μοHoP-value number (rtol=0.01, atol=0.0001)B) Determine if there been a decrease in the variability of arrivaltimes on Southwest. Report the P-value.P-value number (rtol=0.01, atol=0.0001)C) Estimate your arrival time on your next Southwest flight intoChicago with 89% confidence (i.e., give an interval).Lower Bound number (rtol=0.01, atol=0.0001)Upper Boundnumber (rtol=0.01, atol=0.0001)??

Answered: Image /qna-images/answer/dd45d95c-5f14-4da6-b7ee-a64e841984d0.jpg

Answered: Your engineering position requires…

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 random sample of five observations from three normally distributed populations produced the following data: (You may find it useful to reference the F table.) (table is the screenshot picture) a. Calculate the grand mean. (Round intermediate calculations to at least 4 decimal places and final answer to 4 decimal places.) b. Calculate SSTR and MSTR. (Round intermediate calculations to at least 4 decimal places and final answers to 4 decimal places.) c. Calculate SSE and MSE. (Round intermediate calculations to at least 4 decimal places and final answers to 4 decimal places.) d. Specify the competing hypotheses in order to determine whether some differences exist between the population means. _H0: μA = μB = μC; HA: Not all population means are equal. _H0: μA ≤ μB ≤ μC; HA: Not all population means are equal. _H0: μA ≥ μB ≥ μC; HA: Not all population means are equal. e-1. Calculate the value of the F(df1, df2) test statistic. (Round intermediate calculations to at least 4 decimal…

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