Consider the discrete probability distribution shown here:
x | 10 | 12 | 18 | 20 |
p(x) | .2 | .3 | .1 | .4 |
a. Calculate µ, σ2 , and σ.
b. What is p(x *#x003C; 15) ?
c. Calculate µ ± 2σ.
d. What is the probability that x is in the interval µ ± 2σ ?
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