Girls who played video games and got into fights = 36
Girls who played video games and did NOT get into fights = 55
Girls who Never played video games and got into fights = 578.
Girls who Never played video games and did NOT get into fights = 1436
Is there evidence that the proportions of girls who played or have never played video games and have gotten into serious fights differ?
My question: when I finding the proportions, is the played & fight = 36/614?
and the never played & fight = 578/614?
Is that right? or should the denominator be different for both?
To find the proportions, you need to divide the number of girls who fall into each category by the total number of girls. In this case, you have the following data:
Girls who played video games and got into fights = 36
Girls who played video games and did NOT get into fights = 55
Girls who Never played video games and got into fights = 578.
Girls who Never played video games and did NOT get into fights = 1436
To calculate the proportions correctly, you should use the total number of girls as the denominator for both proportions. The correct proportions would be:
Played & fight = 36 / (36 + 55) = 36 / 91
Never played & fight = 578 / (578 + 1436) = 578 / 2014
So, the correct proportions should be calculated by using the total number of girls as the denominator for both cases.