18. Find S.D from the following data. Also calculatecoefficient of variance.X 21-25 26-30 31-35 | 36-40 41-45 46-50 51-55515284215123

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Answered: 18. Find S.D from the following data.…

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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2) Kate works as a manager at a call center. She wants to observe how waiting times of customers to be assigned with a representative show variation so that she can schedule the working hours of employees accordingly. Her claim is that variance between waiting times is no more than 60 minutes. She keeps track of waiting times for 22 customers which are given below: 35 29 12 35 16 28 37 13. 14 38 15 39 23 26 29 16 19 23 15 25 17 28 Kate wants to find the smallest Type 1 error probability that allows her to reject Ho. Define an interval for such Type 1 error probability.
Two companies produce widgets of varying quality. An important measure of quality is the number of days the widgets can go before they need to be replaced. Do the following data provide evidence that the quality of widgets from the two companies differ? Round the p-value to three decimal places. Do not assume equal variances. Widget Life in Days from Company 1 Widget Life in Days from Company 2 12.0 52.2 14.0 45.8 48.4 44.6 47.0 57.5 50.4 44.2 57.4 50.8 30.8 43.0 30.0
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1. The following data gives the number of social interactions of longer than 10 minutes in one week for a group of college students. 12 2 7 17 22 27 32 37 42 47 Compute the range, variance, and standard deviation.
1.) The Test Statistic for this data. (Round answer to 3 decimal places). 2.) The p-value for this sample. (Round answer to 4 decimal places).
Find the variance of the given table in the attached photo
Answer A & B

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18. Find S.D from the following data. Also calculate coefficient of variance. X 21-25 26-30 31-35 36-40 41-45 46-50 51-55 15 28 42 15 12 3