Answer on Statistics and Probability Question for dustin hanshaw
Then the area under the standard normal curve over the
interval [a,b] is equal to the probability
P(X belongs to
In particular, the area under the standard normal curve to the
left some value t is equal to
The function F:R -> R
F(t) = P(X<z)
is called cummulative probability
distruibution and its vaules can be found in almost all books in Probability
We should find F(1.31).
In Excel one can use the function
F(1.31) = P(X<1.31) = NORMSDIST(1.31) = 0.9049
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