Mean and Variance of Discrete Random Variable

Question 1

is considered as measure of the “central location” of a random variable

Answer 1

mean

Question 2

of a discrete random variable x can be computed by first multiplying each possible x value by the probability of observing that value and then adding the resulting quantities.

Answer 2

Expected Value or Mean Value

Question 3

Measure of spread

Answer 3

Variance

Question 4

-Measure of variability

Answer 4

Standard Deviation