Fax Autograph Calculated with airSlate SignNow

Fax autograph calculated

in this tutorial I'm going to discuss : d or effect size I'm going to tell you some introductory information about it as well as how to interpret the results and finally I'll use some real numbers to calculate ad or Co nd or effect size so let's imagine we have a control group that in green and we also have mean right there an experimental group and I'll put that in blue the co ND measures the distance that the means of the two groups have shifted and it's measured in standard deviations how many standard deviations has has shifted they can shift this way to negative anything else will shift positive of course it's frequently labeled Co nd like this and all you need is the mean for both groups and the standard deviations the calculation is relatively simple to do let me put this in back to the control group and also the experimental group here D is equal to the mean of the experimental group minus mean of the control group divided by the standard deviation and we always take the absolute value of this top term so it's always a positive number and in this case we're making the assumption that the standard deviations between the two groups are equal it is considered a really small effect when the D is equal to is actually between zero something greater than zero two point two zero that's considered a small effect and we measure this in standard deviations a medium effect is anything from point two zero two point five zero point two zero two point five zero and this is a medium effect and a large effect is anything more than 0.5 zero when D is greater than 0.5 zero remember the size of the effect is always a positive number always take the absolute value of it because you get a negative number just make it a positive now we made the initial assumption that the two standard deviations were equal to each other but often they're not equal to each other so let me show you how to do that to cure that problem we simply just take the two standard deviations divided by two and this gives us the average standard deviation and we use that as as the denominator let me put some numbers in here we have the mean which is five point one zero the control group and the mean of the experimental group is seven point eight zero the standard deviation is one point six and two point one five we take seven point eight zero minus five point one zero divided by the average standard deviation that's the standard deviation the average of them take one point six six plus two point one five divided by two which is equals to three point eight one divided by two which is equal to one point nine zero so D is equal to seven point eight minus five point one which is equal to two point seven divided by one point nine zero and this equates to D is equal to one point four two which would be considered a very very large effect so if we go back to initially our two bell curves let me draw that back in there and we have slide them across would be a really large effect right so D be equal to one point four two standard deviations so since it's more than 0.5 0 it has a large effect tutorial I just introduced you to the idea of Co nd how to interpret it and I use some real numbers also and I hope this has been useful