First we calculate z using the formula:
z = (x - ΞΌ)/Ο
Where:
x = our variable, 10
ΞΌ = mean, 8
Ο = standard dev, 2
Substituting known
values:
z = (10 - 8)/2
z = 2/2
z = 1
Using the tables of
the normal distribution to find the p-value with z = 1
p = 0.8413
Since we want
"greater than 10β, we need to subtract the probability from 1
therefore
p* = 1 - 0.8413 =Β 0.1587
