1. ### Prop.test function

Hello Is it true to use prop.test function in R in order to compare two proportions? I have two groups of 62 and 107 in which there are 1 and 8 fails respectively.
2. ### One-tailed OR two-tailed

Hello Is it common to use one-tailed hypothesis in a research? Or two-tailed is recommended?? Thanks in advance.
3. ### Appropriate median test

You made a big help in my work. Thanks.
4. ### r correlation

Can she use one sample t-test? And is the principal's PII mean considered as the expected value??
5. ### Appropriate median test

Isn't Mann-Whitney a non-parametric test test for comparing means??
6. ### Appropriate median test

107 and 62 are the groups' sizes. Can I use t-test for comparing their means?
7. ### Appropriate median test

In my research, one hypothesis is that the average (mean) length of stay (Loss) of one group in a hospital ward is shorter than that of another group. Also, I want to examine this hypothesis between the medians of the groups. The distributions of groups' (LoS) aren't normal. So, I need two...
8. ### Appropriate median test

I've used mood.medtest function in the package of RVAideMemoire for comparing the medians of two independent groups in R. The data are interval. But I need a median test for one.sided hypothesis. Do you know any function to meet the test?
9. ### Appropriate median test

And, when they are not symmetric, what test is used for means and what test for medians?
10. ### Appropriate median test

So, what non-parametric test is used to compare the "means" of two independent groups?? I've been tough that Wilcoxon is used for means! Not for medians!
11. ### Appropriate median test

What is the appropriate non-parameteic test for comparing the medians of two groups independent from each other?
12. ### The same answers for different alternatives

I understood that my last answer was inappropriate. I thanked you seriously! I did not know that all P-value s can be more than significance level! Maybe because my main expertise is not related to statistics. I am learning this helpful science recently.
13. ### The same answers for different alternatives

Thank you a lot. The answer was so useful.
14. ### The same answers for different alternatives

It seems reasonable that all P-value s are more than 0.05? What can I conclude from this result?
15. ### The same answers for different alternatives

Hello I compared the means of two independent groups by non-parametric test of Mann-Whitney in R. The same answers were concluded! The P-value is 0.3, 0.63, and 0.68 for less, greater, and two-sided alternatives respectively. What is the reason? Thanks for helping me in advance.