ballin2126
06.03.2020 •
Mathematics
Given that z is a standard normal random variable, compute the following probabilities: a. P(z ≤ −1) b. P(z > .95) c. P(z ≥ −1.5) d. P(−.5 ≤ z ≤ 1.75) e. P(1 < z ≤ 3)
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Ответ:
Step-by-step explanation:
Given that Z is a standard normal variate.
We are to calculate the probabilities as given
F(z) represents the cumulative probability i.e. P(Z<z)
a. P(z ≤ −1)
=F(-1)
= 0.158655
b. P(z > .95)
= 1-F(0.95)
= 0.1711
c. P(z ≥ −1.5)
= 1-F(-1.5)
= 0.9332
d. P(−.5 ≤ z ≤ 1.75)
=F(1.75)-F(-0.5)
= 0.6514
e. P(1 < z ≤ 3)
=F(3)-F(1)
=0.1573
Ответ: