e) Determine how many standard deviations the number 40 is from its average.

f) If you had to estimate the standard deviation, what would your estimate be?

g) According to Tchevyshev's Theorem, between which pair of values must be at least 75% of the data.

h) Make and Draw a Relative Frequency Diagram. Use 5 Classes

1. For the following data: The random variable X is discrete and can only assume the values 0 or 1 or 2

(see figure 1)

Make a relative frequency graph. ( of bars)

b. What proportion of the data is greater than 1?

c. What proportion of the data is less than 2?