Find the z-score of a particular measurement given the mean and standard deviation.

A z-score is an example of a standardized score. A z-score measures how many standard deviations a data point is from the mean in a distribution.

What are z-scores? A z-score measures exactly how many standard deviations above or below the mean a data point is.

Oops. Something went wrong. Please try again. Uh oh, it looks like we ran into an error. You need to refresh. If this problem persists, tell us.

Khan Academy ... Khan Academy

Adding decimals is an essential math skill. In this example, we find the total weight of newborn twins. Nadia weighs 7.27 pounds, and Vanessa weighs 8.34 pounds. By carefully lining up the decimals …

Which of the following expressions can be used to find the perimeter of the triangle?

this program, but I still managed to finish it in less than 24

So using z- and t- statistics doesn't have to do with sample size, it's based on what information we know and have at hand. If we do not have population standard devation, we substitute sample standard …

Some sequences follow a specific pattern that can be used to extend them indefinitely. For example, 2,5,8 follows the pattern "add 3," and now we can continue the sequence. Sequences can have …