A company is considering the introduction of a newtraining program aimed at improving the productivity ofits customer support team. The number of customerinquiries resolved per hour by a sample of 4 supportagents before and after completing the trainingprogram is recorded. Using a significance level of \alpha= 0.05, test whether the training program has resultedin a significant increase in the mean number ofcustomer inquiries resolved per hour by the supportteam. resolved cases: customer agent 1: before 6, after8. customer agent 2: before 10, after 10. customeragent 3: before 8, after 10. customer agent 4: before11, after 12. state null and alternative hypothesis,compute the test statistic, p value, and provice a 95%confidence interval for the difference of number ofinquries resolved after the training program

The company introduced a new training program aimed at improving the productivity of its customer…

Answered: A company is considering the…

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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solve for image and find critical values
Every year, all incoming high school freshmen in a large school district take a math placement test. For this year’s test, the district has prepared two possible versions: Version 1 that covers more material than last year’s test and Version 2 test that is similar to last year’s test. The district suspects that the mean score for Version 1 will be less than the mean score for Version 2. To examine this, over the summer the district randomly selects 90 incoming freshmen to come to its offices to take Version 1, and it randomly selects 75 incoming freshmen to come take Version 2. The 90 incoming freshmen taking Version 1 score a mean of 113.0 points with a standard deviation of 16.8 . The 75 incoming freshmen taking Version 2 score a mean of 117.0 points with a standard deviation of 18.5 . Assume that the population standard deviations of the test scores from the two versions can be estimated to be the sample standard deviations, since the samples that are…
Please answer all sub-parts Clinical trials involved treating patients with Tamiflu, which is a medicine intended to attack the influenza virus and stop it from causing flu symptoms. Among 724 patients treated with Tamiflu, 72 experienced nausea as an adverse reaction. Use a significance level of 0.05 to test the claim that the rate of nausea experienced by patients who were given Tamiflu is higher than the 6% rate experienced by flu patients who were given a placebo.
Do wearable devices that monitor diet and physical activity help people lose weight? Researchers had 237 subjects, already involved in a program of diet and exercise, use wearable technology for 24 months. They measured their weight (in kilograms) before using the technology and 24 months after using the technology. (a) Explain why the proper procedure to compare the mean weight before using the wearable technology and 24 months after using the wearable technology is a matched pairs t test. Choose the correct explanation. A person's weight before and after wearing the device would not be independent; thus, the data from this before and after study should be analyzed using a matched pairs t test. O A person's weight before and after wearing the device would be independent; thus, the data from this before and after study should be analyzed using a matched pairs t test. O A person's weight before and after wearing the device would be independent; thus, the data from this before and after…
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Only one can be chosen

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