Qi Wang, Department of Statistics
Nov 3, 2017
$X \sim N(\mu, \sigma)$
Checking account balances, X, are approximately normal with a mean of 1500 dollars and a standard deviation of 50 dollars
What if we know the probability and want to find the related z-score and the value in the original distribution? We will work the table backwards!
Steps to finding the sample score if you are given a probability and know $X \sim N(\mu, \sigma)$
Find for each of the following:
If $X\sim N(\mu = 4, \sigma = 1.5)$, find $x_0$ for each of the following:
The weekly amount spent for maintenance and repairs at a certain company has an approximately normal distribution with a mean of 650 dollars and a standard deviation of 35 dollars.