For the experience variable: Answer the parts of exercise 2.
a. Construct a histogram and indicate the average and standard deviation.
b. How many employees are within one standard deviation from the average? How does this compare to what you would expect for a normal distribution?
c. How many employees are within two standard deviations from the average? How does this compare to what you would expect for a normal distribution?
d. How many employees are within three standard deviations from the average? How does this compare to what you would expect for a normal distribution?