A university that offers evening classes to a large number of students who commute to campus wants to estimate themean commute time of all evening students. A parking facilities attendant selects one parking lot on campus, thenselects the first 60 students who drive into the lot on a certain evening. Each of the 60 students is asked to providetheir typical commute time to campus. The university will create a confidence interval for the mean commute timeof evening students.Are the conditions for inference satisfied?(A) Yes, all conditions for inference are satisfied.(B) No, because the distribution of the population mean commute time is not known to be normally distributed.(C) No, because the sample size is greater than 10% of the population size.(D) No, because the students selected are not a random sample of all evening students.(E)No, because the sample size of 60 is not large enough to assume that the sampling distribution of the samplemean commute time is approximately normal.

The objective of the question is to determine whether the conditions for inference are satisfied in…

Answered: A university that offers evening…

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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At a local food processing plant, it used to take an average of 90 minutes for new workers to learn a food processing job. Recently the company installed a new food processing machine. The supervisor at the company wants to find if the mean time taken by new workers to learn the food processing procedure on this new machine is different from 90 minutes. A sample of 20 workers showed that it took, on average, 85 minutes for them to learn the food processing procedure on the new machine. It is known that the learning times for all new workers are normally distributed with a population standard deviation of 7 minutes. Use a significance level of 0.01 to test the claim that the mean time is different from 90 minutes. What is the decision? A) Reject Ho because the test statistic is in the critical region and the p-value is greater than the significance level. B) Reject Ho because the test statistic is not in the critical region and the p-value is greater than the significance level.…
At a local food processing plant, it used to take an average of 90 minutes for new workers to learn a food processing job. Recently the company installed a new food processing machine. The supervisor at the company wants to find if the mean time taken by new workers to learn the food processing procedure on this new machine is different from 90 minutes. A sample of 20 workers showed that it took, on average, 85 minutes for them to learn the food processing procedure on the new machine. It is known that the learning times for all new workers are normally distributed with a population standard deviation of 7 minutes. Use a significance level of 0.01 to test the claim that the mean time is different from 90 minutes. What is the test statistic? A) -7.01 B) -2.539 C) -3.19 D) -2.528 E) -1.96

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