SOLUTION: Suppose a simple random sample of size 64 is obtained from a population with a mean μ=80 and standard deviation σ=16 . Use this information to find P(x > 86).

Algebra ->  Probability-and-statistics -> SOLUTION: Suppose a simple random sample of size 64 is obtained from a population with a mean μ=80 and standard deviation σ=16 . Use this information to find P(x > 86).      Log On


   



Question 1183821: Suppose a simple random sample of size 64 is obtained from a population with
a mean μ=80 and standard deviation σ=16 . Use this information to find
P(x > 86).

Answer by Edwin McCravy(20055) About Me  (Show Source):
You can put this solution on YOUR website!
Suppose a simple random sample of size 64 is obtained from a population with
a mean  μ=80  and standard deviation  σ=16 . Use this information to find
P(x > 86).
On your TI-84, 
press 2ND 
press VARS
press 2

Make the screen read: 

    normalcdf
lower:86
upper:99999999
μ:100
σ:16/√(64)        <---the square root key is 2ND x2
Paste

Scroll down with the down arrow to Paste

Press ENTER

Read on the screen

normalcdf(86,99999999,80,100,16/√(64))

Press ENTER

Read 0.0013499672 round to 0.0013

Edwin