11. Discrete Probability Distributions
Interactive practice questions
Consider the table.
| $x$x | $0$0 | $1$1 | $2$2 | $3$3 | $4$4 |
|---|---|---|---|---|---|
| $P$P$($($X=x$X=x$)$) | $0.12$0.12 | $0.15$0.15 | $0.22$0.22 | $0.23$0.23 | $0.28$0.28 |
a
Does the table represent a discrete probability distribution?
Yes
A
No
B
b
Calculate $E\left(X\right)$E(X).
c
Calculate the variance of $X$X.
d
Hence calculate the standard deviation.
Give your answer to two decimal places.
Easy
5min
A uniform discrete random variable $X$X has values $x=1,2,3,4,5$x=1,2,3,4,5.
Medium
3min
Consider the graph drawn below of a discrete probability distribution.
Medium
4min
Consider the probability distribution shown.
Medium
4min
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