00:01
Our null hypothesis is that the mendel's distribution is followed, or that the data is following that distribution, and alternately mendel's distribution is not following.
00:22
And so that distribution is that 9 -331 ratio.
00:27
And so we have our data as the following.
00:32
We have the observed values are 307, and that is for yellow smooth.
00:39
And then we have 77 for green smooth and 98 for yellow wrinkled.
00:49
And we have 18, i'm sorry, for green wrinkled.
00:55
And these total up to 500.
00:57
And our expected proportion is 9 .16th, 316th, 316th, and 116th.
01:09
And those add up to 1.
01:10
And so we need to multiply all of those by 500 and find out what the actual expected value is out of 500.
01:18
And i did that on my calculator, and this comes out to be 281 .25.
01:25
This is 93 .75, 93 .75, and 31 .25.
01:35
So our kai squared statistic with four categories, so we have three degrees of freedom, will be equivalent to the 307 minus 281 .25 squared divided by that 281 .25, and we're going to do that for all four of the cells...