Drawing the Z values in statistics involves working with a very particular formula. Find out how to draw the Z values in statistics with help from a mathematics educator in this free video clip.

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Drawing the Z values in statistics involves working with a very particular formula. Find out how to draw the Z values in statistics with help from a mathematics educator in this free video clip.

Part of the Video Series: Statistics 101

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Hi, I'm Jimmy Chang, and we're here to talk about how the draw the Z values in statistics. Now, Z values can be thought of as the scores and there's actually a formula associated with that; so, let's talk about what it might be. Now, the formula here is going to be Z is equal to x-mu over sigma. Now, let me just break it down to you a little bit as to what that means. Z refers to the z score, x is the data point, mu refers to the mean and sigma refers to the standard deviation. Now, all of these are going to be numbers here. So, to find the Z value, just plug the number they gave you for x, find the number they gave you for the mean and then find, and then plug in the number they gave you for standard deviation. So, if you have let's just say the mean was 30, standard deviation was 3 and you want to find the Z value for x is equal to 40, just plug them in. So, you have Z is equal to 40 minus 30 over 3. So, that'll be 10 over 3 and that's not really reducible, so you're Z score is going to be ten thirds. So, to find the Z value is pretty straightforward as long as you know what numbers that you're given. So, I'm Jimmy Chang, and that's how to find the Z values in statistics.