The scores on a standardized test are normally distributed with the mean of 750 and standard deviation 70. Find the probability that a score is more than 890.

Question

This is from my Math Models class. I am not taking Statistics. Please someone show me how to do answer this-I don't just want an answer. I want the steps!!

Answer 1

this just involves using the Z table.
890 is 140 away from the mean.
That's 140/70 = 2σ

So, find where Z>2. That's your probability. To play around some with this, visit

http://davidmlane.com/hyperstat/z_table.html