Suppose that a population is known to be normally distributed with =2,300 and =2
ID: 3337664 • Letter: S
Question
Suppose that a population is known to be normally distributed with =2,300 and =260.
If a random sample of size n=8 is selected, calculate the probability that the sample mean will exceed 2,400.
P(x >2,400)equals=_______ (Round to four decimal places as needed.)
Suppose that a population is known to be normally distributed with =2,300 and =260.
If a random sample of size n=8 is selected, calculate the probability that the sample mean will exceed 2,400.
P(x >2,400)equals=_______ (Round to four decimal places as needed.)
Explanation / Answer
P(x >2,400)
Mean = 2300
=260
z = (2400 - 2300)/260/8
z = 1.09
P( z > 1.09) = 0.1379