Prob

Question 1

E(X^2)

Answer 1

sum of ‘x’^2 x P(X=x)

Question 2

Var(X)

Answer 2

E(X^2) - E(X)^2

Question 3

F(no)

Answer 3

P(X no)

Question 4

how to calculate F(X no)

Answer 4

ADD all P(X=x) where ‘x’ is below and including the no

Question 5

if F(2.999…)

Answer 5

Round down - P(X 2)

Question 6

P(Y>/ X) where P(Y) = P(7-2X)

Answer 6

P(7 - 2X >/ X) - rearrange to get P(X no)

Question 7

sum of P(X=x)

Answer 7

= 1

Question 8

Table

Answer 8

x
P(X=x)

Question 9

name of table

Answer 9

uniform distribution

Question 10

E(X)

Answer 10

sum of ‘x’ x P(X=x)