If the age of a sample of seven employees of a fast-food outlet (X) are as follows:

19, 19, 65, 20, 21, 18, 20

1) Compute the best central measure.

2) If the oldest employee is retired, compute the best central measures.

3) If the employees in this outlet has a mean of age as with variance between their ages as . Find the mean and the standard deviation of the age of employees of a fast-food in another outlet (Y), if the relation between them is as follows:

Y = - 0.5 X + 35