Consider the probability distribution shown here:
x | –4 | –3 | –2 | –1 | 0 | 1 | 2 | 3 | 4 |
p(x) | .02 | .07 | .10 | .15 | .30 | .18 | .10 | .06 | .02 |
a. Calculate μ, σ2, and σ.
b. Graph p(x). Locate μ, μ – 2σ, and μ + 2σ on the graph.
c. What is the probability that x will fall into the interval μ ± 2σ?
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