R

I am new to the forum. I had a bit of training in statistics and research, particularly statistics in psychology, but I have some basic questions that are holding me back. I would appreciate the help.

1. How can I determine the ideal sample size for a study (upper and lower limits)?

2. How do I test for normality in SPSS? Does it vary for different hypothesis/analysis using the same dataset or does it remain the same (is normality dependent on DVs and IVs or not)?

3. When exactly do we need to use Bonferroni adjustment? I know it is debatable to use (or not use) Bonferroni adjustment when the hypotheses are independent of each other, but I was wondering if someone could elaborate a bit more for me (explain in layman terms)?

Thank you again. I have more questions, but I guess this would be a good starting point

Raghav