In our enhanced mixed ANOVA guide, we: (a) show you how to detect outliers using SPSS Statistics, whether you check for outliers in your 'actual data' or using 'studentized residuals'; and (b) discuss some of the options you have in order to deal with outliers. Assumption #5: Your ...
Find the Independent Samples Test Table in the data output. This table gives the actual results from the t-test. Check to determine if the variance in the two test groups are similar. This is done by looking at the results of Levene’s Test for Equality of Variances that is given within...
a p-value less than 0.05 is to be taken as significant meaning that there is a significant difference in the means of the two sample populations tested (i
Let’s talk about each point in turn. First, you need to figure out the size of the signal that is important to you to detect. This is going to be based on practical or academic considerations. Examples of such considerations could be “Demonstrate a 15 lbs improvement in yield per acre...
the normal distribution in a statistics table. Statistics tables can be found online or in statistics textbooks. Find the value for the intersection of the correct degrees of freedom and alpha. If this value is less than or equal to the chi-square value, the data is statistically significant....
Post hoc tests are statistical tests typically used following a significant result from another test. Some examples of post hoc tests are the Holm-Bonferroni procedure, Fisher's LSD, Tukey's HSD, and Scheffe's method. They are usually administe...
The means of these absolute differences should be roughly equal over groups. So technically, Levene’s test is an ANOVA on the absolute difference scores. In other words: we run an ANOVA (on absolute differences) to find out if we can run an ANOVA (on our actual data)....
Currently the main goal is therefore to find a reliable, easy, noninvasive, and inexpensive method of determining the dose of dialysis that is effectively delivered, ideally at each session. Since the urea distribution volume does not change over brief periods of time and treatment length is a ...
Do changes to the independent variables have statistically significant effects on dependent variables? What are the interactions among dependent variables? What are the interactions among independent variables? MANOVA Example Suppose you wanted to find out if a difference in textbooks affected students’ ...
You can find the steps for anindependent samples t test here. But you probably don’t want to calculate the test by hand (the math can get very messy. Use the following tools to calculate the t test: How to do a T test in Excel. ...