only part a The table lists the number of computers per hous

The table lists the number of computers per household in the United States. a) Construct a discrete probability distribution. Find the mean, variance, and standard deviation of the probability distribution and interpret the results. c) Find the probability of randomly selecting a household that has at least four computers? d) Find the probability of randomly selecting a household that has less than three computers?

Solution

PDF is as follows:

Computers	0	1	2	3	4	5	Total
No of households	27	47	24	10	4	2	114
(in millions)
Relative freq	0.236842	0.412281	0.210526	0.087719	0.035088	0.017544	1
Probability