Day 70 Chi Charts
When presenting data in science it is not enough to just say that something is significant you need to show how significant the data is with math.
So you say that your data supports your hypothesis...prove it to me!
A chi-chart will so me whether or not your data supports your hypothesis and to what degree.
The X squared represents Chi-squared
The sigma means sum of
The O means observed data
The E means expected data
The Expected data should be based on a Null Hypothesis which is usually the opposite of your hypothesis
-The reason we use a Null hypothesis is because it is easier to prove something wrong than it is to prove something write
-In order to show that our hypothesis is right we prove that the opposite of our hypothesis is wrong
In order to figure out whether or not our data is significant we use a Chi-Chart
You have to figure out how accurate you want your data to be and compare that to the critical values
You also need to know how many degrees of freedom you have. To figure out your degrees of freedom you subtract your variables or tests by one. For example if there is two possible outcomes then your degree of freedom is one.
Here is a more detailed chi chart
