Would the calculation you performed in Question 3 still be valid if the salaries in question are NOT normally distributed? Why?

Suppose 50 managers were randomly selected. What is the probability that their average annual salary is over 40,500 EUR?

Compute the standard deviation of ()  in Question 1 above

Consider sampling with sample size 50 on the above population. Compute the mean of the sampling distribution of the mean ().

Randomly select 150 managers with over 5 years of experience. Find the probability that less than 99 of them received bonus income every year.

Compute the standard deviation of   in Question 5 above.

Compute the mean of the sampling distribution of proportion () with sample size 150.

Randomly select 30 accountants in the study. What is the probability that the mean of the sample in Question 3 is less than the average salary of the selected accountants?

Based on the result in Question 12 above, is it reasonable to believe that the standard deviation of the salaries in 2021 is the same as that of 2020?