Solution:
Given that , X follows normal distribution with
= 16
= 10
A sample of size n = 16 is taken from this population.
Let be the mean of sample.
The sampling distribution of the is approximately normal with
Mean() = = 16
SD() = = 10/16 = 2.5
Find P( > 35)
= P[( - )/ > (35 - )/]
= P[Z > (35 - 36)/2.5]
= P[Z > -0.40]
= 1 - P[Z < -0.40]
= 1 - 0.3446 ( use z table)
= 0.655
Answer : 0.655
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