SOLUTION: Please help me solve this problem.
A normal distribution consists of 100 scores with a mean of 60 and a standard deviation of 5. Approximately how many scores are above
Algebra ->
Probability-and-statistics
-> SOLUTION: Please help me solve this problem.
A normal distribution consists of 100 scores with a mean of 60 and a standard deviation of 5. Approximately how many scores are above
Log On
A normal distribution consists of 100 scores with a mean of 60 and a standard deviation of 5. Approximately how many scores are above 70 (round off to the nearest whole number)?
You can put this solution on YOUR website! A normal distribution consists of 100 scores with a mean of 60 and a standard deviation of 5. Approximately how many scores are above 70 (round off to the nearest whole number)?
------
z(70) = (70-60)/5 = 2
---
P(70 < x <= 100) = P(z > 2) = normalcdf(2,1000)
---
= 0.0228
----
That's a fraction of percentage.
The number of scores is approximately 0.0228(100) = 2.28
Rounding down the number of scores is 2.
===================
Cheers,
Stan H.
========
(