1.An estimate of:
- the mean salary for ALL Cleveland employees.
- the proportion of ALL Cleveland employees who are very satisfied and moderately satisfied with their job.
2.The mean salary across the industry is $28,500. Senior management claims that our employees earn more than the industry average. Check the validity of this claim?
3.Senior management also believes that the proportion of employees who moderately satisfied and very satisfied with their job is at least 92%. Is this true?
4.Is there a significant difference in the mean salary of ALL male and ALL female employees?
5.I am concerned that a sample of 450 Cleveland employees may not provide us with very accurate estimates. For future surveys, what sample size would be needed in order to be able to estimate:
a.the mean salary for ALL Cleveland employees to within $900, with 95% confidence?
b.the proportion of ALL Cleveland employees who are very satisfied and moderately satisfied with their job to within 2%, with 95% confidence?