Hello Everyone,
I have one population, sample size 200. and needed to find the correlation between Variable A and B. Also, which T-test should I choose for hypothesis testing
Please advise which statistical test using SPSS will be good for below research questions:
Is there a relationship between Variable A and Variable B?
Are there any differences in risk score by gender ( Male vs. Female)?
Thanks in advance.
Will appreciate your response.
Best Regards,
Meraj Farheen Ansari.
The measurement level of the variables decides about the correct statistical analysis. If A and B are numerical variables, correlation is often fine (given a linear association). If A is independent and B is dependent, using regression in this case also works fine. But if A is gender (categorical) and B is risk score (numerical), ANOVA or regression is probably the way to go. The latter will examine a gender difference in risk score.
If your variables A & B are on the same scale, you can run a repeated measures ANOVA, with Gender as the between factor and the 2 variables as the within factor.
If A is an independent variabel, you can run an ANCOVA, i.e. a regression:
B = A + gender (in that order)
Note that the interaction "A * Gender" should not be significant. If there is an interaction between Gender and variable A, you can rely on the Jonhson-Neyman technique to see where there could be differences.
see:
https://kenstoyama.wordpress.com/2018/01/21/the-johnson-neyman-tecnique-and-an-r-script-to-apply-it/
You have not provided all details ie the nature of your data (ordinal, nominal, ratio etc), so that you can decide whether to use Pearson or spearman? There are conditions to use (dependent and independent t-tests) select the appropriate
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