Answer:
0.21
Step-by-step explanation:
Given a distribution :
N(0, 1) - - - > Normal distribution
Probability of obtaining a non - negative observation :
P(x ≥ 0) = 0.5 ( Z probability calculator)
Hence, p = 0.5 ; (1 - p) = 1 - 0.5 = 0.5
P(x = 4) :
Using the binomial probability function :
P(x = x) = nCx * p^x * (1 - p)^(n-x)
P(x = 4) = 10C4 * 0.5^4 * 0.5^10 - 4
P(x = 4) = 210 * 0.0625 * 0.015625
P(x = 4) = 0.205078125
P(x = 4) = 0.21
