Answer:
X P(x) x•P(x) x-u (x-u)² (x-u)²•P(x)
19 0.4 7.6 2.7 7.29 2.916
20 0.2 4 3.7 13.69 2.738
21 0.2 4.2 4.7 22.09 4.418
22 0.1 -1.8 5.7 32. 49 3.249
23 0.1 2.3 6.7 44.89 4.489
______ ______
16.3 17.81
Step-by-step explanation:
Tignan niyo lang ang picture, nandun ang sign, wala kasi sa keyboard ko yung sign eh.
The variance of the probability distribution is 17.81
The satandard deviation is ó=(square root) 17.81=4.22
