Question
Scores on a test are Normally distributed with mean 78 and standard deviation 8. Find the probability that a randomly chosen student scored between 70 and 80 on the test.
Answers
oobleck
70 = µ - 1σ
80 = µ + 0.125σ
so, what does your Z table tell you?
You can play around with Z-table stuff at
https://davidmlane.com/hyperstat/z_table.html
80 = µ + 0.125σ
so, what does your Z table tell you?
You can play around with Z-table stuff at
https://davidmlane.com/hyperstat/z_table.html