10.3 Standard Normal Distributions

the standard normal distribution

is a normal distribution with μ=0 & standard deviation =1

z-score

n=size of the sample.

Z tells us how many st.devs a value is from the mean

Because all the normal distributiojns can now be turned in to the same standard normal distribution curve, we can use ____ to find the area under the curve of any normal distribution. This means that we can find the ____ of any data value, not just within a certain number of standard deviations

1. calculus

2. probability

numbers in the Z-score table do

helps to know the percentage of values below (to the left) a z-score in a standard normal distribution.