The NYTimes ran a recent report on the increasing cost of employee poor mental health to companies (because employees take more sick days). You wish to estimate the missed number of days due to mental health and you collect a random sample of 81 employees of Amazon (which is notorious for a stressful work environment). Within this sample, the data showed that employees took an average of 12 days off from work per year for mental health reasons. Assume the population standard deviation is known to be 20 days. A 90% confidence interval for the average number of days taken off for mental health for Round to 2 decimal places. all employees per year is

The NYTimes ran a recent report on the increasing cost of employee poor mental health to companies (because employees take more sick days). You wish to estimate the missed number of days due to mental health and you collect a random sample of 81 employees of Amazon (which is notorious for a stressful work environment). Within this sample, the data showed that employees took an average of 12 days off from work per year for mental health reasons. Assume the population standard deviation is known to be 20 days. A 90% confidence interval for the average number of days taken off for mental health for Round to 2 decimal places. all employees per year is

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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It is known that average house prices today is $371,040 higher compared to 10 years ago and median in the current time also $382,000 higher than house prices 10 years ago. Provide an interpretation of the change of mean and median based on the information above. Compare and contrast these values and comment on the distribution of the increases in house prices.
You hypothesize that people in stats classes are happier than people in all other classes. You compare happiness scores in three of your classes: Statistics, Developmental Psychology, and Social Psychology. In Statistics there are 15 students and the mean happiness rating is 23.1 with a standard deviation of 9.78. In Developmental Psychology there are 15 students and the mean happiness rating is 24.4 with a standard deviation of 2.92. In Social Psychology there are 15 students with a mean rating of 17.7 and standard deviation of 8.46. The sum of squares between groups is equal to 384. The sum of squares within groups is equal to 2461. Use the One-Way ANOVA calculation table to help calculate. What is the degrees of freedom between samples?
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