From inside the plain english, equation 9.4 would be read due to the fact “square the difference, divide from the share”, and therefore simple formula often is did through intellectual calculations alone.
Now we can return to our very own example out of more than having 62 adult and 38 recombinant allele combinations and use formula 9.cuatro to select the suitable c 2 value. The difference between the brand new number regarding a couple of observance groups (62-38 = 24) is actually squared to produce 576, and this worth are split by full measurements of brand new tested people (100) to give 5.76.
On the backcross example below conversation, you will find outlined two prospective result categories: recombinant and you may adult. Understanding the amount in either classification, in addition to the total attempt proportions, provides the amount on the almost every other group. Therefore, what amount of degrees of freedom in this situation is just one.
With a-c 2 worth plus the amount of degrees of versatility inside the-give, it’s possible to proceed to a c dos likelihood research-right up desk like the you to demonstrated in the Desk nine.dos.