Question

Three tables listed below show random variables and their probabilities. However, only one of these is actually a probability distribution.

A			B			C
x	P(x)		x	P(x)		x	P(x)
25	0.1		25	0.1		25	0.1
50	0.1		50	0.1		50	0.1
75	0.6		75	0.6		75	0.6
100	0.2		100	0.4		100	0.6

a. Which of the above tables is a probability distribution?

(Click to select)  A  C  B

b. Using the correct probability distribution, find the probability that x is: (Round the final answers to 1 decimal place.)

1.	Exactly 100 =
2.	No more than 50 =
3.	More than 25 =

c. Compute the mean, variance, and standard deviation of this distribution. (Round the final answers to 2 decimal places.)

1.	Mean µ
2.	Variance σ2
3.	Standard deviation σ

Answer 1

Answer:-

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