Assume a binomial distribution where n 5 and formula139mml
Assume a binomial distribution where n = 5 and formula139.mml. a. Refer to Appendix B.1 and list the probabilities for values of x from 0 to 5. (Round your answers to 3 decimal places.) x P(x) 0 1 2 3 4 5 b. Determine the mean and standard deviation of the distribution from the general definitions given in formulas (6-1) and (6-2). (Round your mean value to 2 decimal places and standard deviation value to 3 decimal places.) Mean Standard deviation
Solution
Here, just as an example, we let n = 5, p = 3.
Consider the table:
Thus,
E(x) = 1.5 [ANSWER, MEAN]
Var(x) = E(x^2) - E(x)^2 = 1.05
s(x) = 1.024695077 [answer, standard deviation]
| x | P(x) | x P(x) | x^2 P(x) |
| 0 | 0.16807 | 0 | 0 |
| 1 | 0.36015 | 0.36015 | 0.36015 |
| 2 | 0.3087 | 0.6174 | 1.2348 |
| 3 | 0.1323 | 0.3969 | 1.1907 |
| 4 | 0.02835 | 0.1134 | 0.4536 |
| 5 | 0.00243 | 0.01215 | 0.06075 |
