Using probability distribution liste
x. 0. 1. 2. 3
P(x). 0.2. 0.1. 0.3. 0.4
A- find the mean ,variance,and standard deviation
B- what is the probability that p(x is at least 1)?
C-what is the probability that p(x is less than 3)?
A- mean = 1.9 , variance = 1.29 , standard deviation = 1.1358
B- p(x is at least 1) = 0.1+0.3+0.4 = 0.8
C- p(x is less than 3) = 0.2+0.1+0.3 = 0.6
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