Q 3
Are employees who work more hours per week less satisfied with their job? Data was collected from a random sample of 22 employees at a company on the following variables:
Job satisfaction (measures 0 to 100)
Total hours worked per week
Coefficients |
Standard Error |
|
intercept |
120.7223 |
16.8721 |
X variable 1 |
-1.2033 |
0.3188 |
(a)Construct a 95% confidence interval estimate of the population mean job satisfaction for employees who works 55 hours per week. The sample mean total hours worked per week was 51.1818 and the sample standard deviation was 13.7517. please show your working to support your answer.
(b)Below is the residual diagnostic plot (residual versus fitted values) and histogram of the residuals for the simple linear regression model. Comment on whether the required assumptions for the simple linear regression model have met by the data. Give reasons for your answer.
For any violations of the assumptions, suggest how you can modify the model so that the required assumptions are satisfied
(c)
Q 3 Are employees who work more hours per week less satisfied with their job? Data...
Question 2 Suppose a researcher gathered survey data from 19 employees and asked the employees to rate their job satisfaction on a scale from 0 to 100 (with 100 being perfectly satisfied). Suppose the following data represent the results of this survey. Assume that relationship with their supervisor is rated on a scale from 0 to 50 (0 represents a poor relationship and 50 represents an excellent relationship); overall quality of the work environment is rated on a scale from...
Suppose another researcher gathered survey data from 19 employees on these questions and also asked the employees to rate their job satisfaction on a scale from 0 to 100 (with 100 being perfectly satisfied). Suppose the following data represent the results of this survey. Assume that relationship with supervisor is rated on a scale from 0 to 50 (0 represents poor relationship and 50 represents an excellent relationship), overall quality of the work environment is rated on a scale from...
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