Question
A concerned parents group determined the number of commercials shown in each of five children’s programs...
A concerned parents group determined the number of commercials shown in each of five children’s programs over a period of time.
|
Number of commercials, X |
5 |
6 |
7 |
8 |
9 |
|
Probability, P(X) |
0.2 |
0.25 |
0.38 |
0.10 |
0.07 |
(a) Find the mean, variance, and standard deviation for the distribution shown.
(b) What is the probability that fewer than 6 or more than 8 commercials.
(c) What is the probability that at least 6 commercials.
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