After you know the values you're comparing, you can calculate the difference. To apply the percent difference formula, determine which two percentage values you want to compare. Now a new company, T, with 180,000 employees, merges with CA to form a company called CAT. At the end of the day, there might be more than one way to skin a CAT, but not every way was made equally. Variability Rat sample 1 Rat sample 2 Between Same Same Within Smaller Larger Ratio Larger in sample 1 than sample 2 Rat ID number Diet Weight(g) 1 A 23.84 2 A 23.21 3 B 20.66 4 B 24.34 5 C 23.90 6 C 31.10 etc. That is, it could lead to the conclusion that there is no interaction in the population when there really is one. I will probably go for the logarythmic version with raw numbers then. The weighted mean for the low-fat condition is also the mean of all five scores in this condition. Comparing Two Proportions - Sample Size - Select Statistical Consultants In turn, if you would give your data, or a larger fraction of it, I could add authentic graphical examples. This is the case because the hypotheses tested by Type II and Type III sums of squares are different, and the choice of which to use should be guided by which hypothesis is of interest. SPSS calls them estimated marginal means, whereas SAS and SAS JMP call them least squares means. Recall that Type II sums of squares weight cells based on their sample sizes whereas Type III sums of squares weight all cells the same. CAT now has 200.093 employees. Even with the right intentions, using the wrong comparison tools can be misleading and give the wrong impression about a given problem. For a deeper take on the p-value meaning and interpretation, including common misinterpretations, see: definition and interpretation of the p-value in statistics. Lastly, we could talk about the percentage difference around 85% that has occurred between the 2010 and 2018 unemployment rates.