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Q1) Use frequency distribution to create a probability distribution, determine the (b) mean,(c) variance and (d) standard deviation of probability distribution and (e) interpret results in the context of real life situation.

Computers:

Number of computers per householdin a small town

Computers	0	1	2	3
Households	300	280	95	20

Q2) Sociologist surveyed households in aneighboring town. Random variable x represents number of dependent children in the house holds.

x	0	1	2	3	4	5	6
P(x)	0.05	?	0.23	0.21	0.17	0.11	0.08

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