Maybe this should be in calculus instead...(adsbygoogle = window.adsbygoogle || []).push({});

I'm getting reaquainted with stats and I ran across the z-table again. I always wondered how the value in the table are populated.

As I understand it, the values in the table are just the value along the X axis and the corresponding area for a normal distribution. Wouldn't this be the same as find the area under the curve using an integral in calculus?

I don't know the equation for the curve used in creating the z-table.

Anyway, if what I said is true, then I should be able to make an equation for whatever curve is generated by the data. I made up some data below with a strong left curve.

X value Y value

1 1

2 2

3 3.3

4 5

5 7

6 9

7 11

8 11

9 9

10 2

1. How do I make an equation using these data points?

2. Once I have that equation, how do I integrate?

Note: I will answer Qs 1 and 2 soon. I am wondering if my original thoughts on how a z-table are created are true. When I asked in class some 2 years ago I remember my prof saying "you don't want to go into that, it's complicated"! :P

Thanks PF crew!

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# Calculus to find the z-score?

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