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    Reasons and advantages of using an ANCOVA instead of a Regression

    Hello everyone, Just wondering if any of you could help me. Just wondering when the variables I’m using can be used for both ANCOVA and regression, what would be the advantages of using an ANCOVA? The way I’m using it is that the impact of the variable of interest is being examined by...
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    Need help with power analysis GPower Novice

    Hello everyone. I am doing a power test for Fishers Exact Test on GPower, and dont know how to determine the proportions p1 and p2. I have 2 categories that im looking at if there is a difference between one and other across 4 rows. How would i calculate the P1 and P2 for this. Basically i...
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    How to calculate probability of two samples

    Hello everyone, Just need advice how to calculate probability of two samples in a 2 x 4 table. so say i have two groups (brown haired people and blonde haired people) and the columns are 4 levels on a game. I have the counts for the numbers of people that got to each level. How do I...
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    help needed with Fishers Exact Test (power calculation)

    Hello everyone. Hope someone can help me. I am running a Fisher exact 4 X 2 table analysis in SPSS. I have been informed its the correct test to use for the data. The problem is I have to conduct a power analysis to determine how many in both groups i need to be able to detect significance...
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    Repeated measures ANCOVA in SPSS help needed with multiple covariates

    Hello everyone. Hope someone can help. I have a repeated measures (4) ancova I need to run with no between subjects factor. I have 5 covariates. Im trying to get the effect of 1 covariate on the repeated measures when accounting for the other 4 covariates. How best to do this? Thanks in...