11. Correct. The answer is false

 

Given the confidence interval for 95 % which is

, also given the following parameters , ,

 

Using the 95% Level of confidence z = 1.96

95% confidence interval for m is

 

and therefore

 

Interpretation:

 

For 95% of the samples the true population mean () lies in the interval .

Or the average number of days off sick for employees in the population is likely to be between 7.71 and 8.69.