# Search results

1. ### Hello all, I'm Girl

Hi. I removed the link to your photo. I'm not sure why you wanted to share that right away but in case it was in some way nefarious I took down the link. In any case - welcome to TalkStats! Hopefully you have a good time here discussing statistics!
2. ### check if X variable influences Y or Y influences X

Without doing something else I don't think linear regression is going to get you anything more than correlation would to answer your question. You might be interested in Granger causality testing though.
3. ### check if X variable influences Y or Y influences X

If you're just looking at the two variables and not lagging them or something then the correlation between X and Y is the same as the correlation between Y and X so... Trying to compare those correlations won't be very useful.
4. ### Test priori power - Welch T test

Even better would just be to simulate the data and let the functions in R take care of running the test for you.
5. ### Test priori power - Welch T test

I would simulate to figure out which makes more sense
6. ### Seeking Basic Statistics Resources

I'm not sure where you read that standard deviation measures flatness/sharpness but that isn't true. Kurtosis is typically what is referred to to measure that. Standard deviation is a measure of how spread out the data is.
7. ### Outliers Parametric model

Can you just post a small sample of the data directly in the thread? I'm on my phone's and viewing external files isn't convenient
8. ### Outliers Parametric model

Can you post a sample of the data and say what your goal/question is
9. ### Outliers Parametric model

Is it really unreasonable? My understanding is that they don't get the money unless they reach their goal so setting it to be \$1 and bring happy with whatever they raise might be something that makes sense to them
10. ### Monty Hall Problem in dutch game show

I agree but I don't know if the banker's offer depends on the unknowns. If the offers are purely a function of what values are still available then that wouldn't provide any information about the unknowns but If the offers do depend on the unknowns in some predictable way then that might be...

What have you tried
12. ### 3 Independent and 3 Dependent Variables

You don't know if it's possible? I think you're right. There can't be any dataset with more than six columns. Sorry for being an ass but it's pretty obviously possible.
13. ### concatenate - Loop with variables

I think your entire approach is probably done better in some other way but it's hard to give explicit advice on what exactly you should be doing instead without a reproducible example.
14. ### Conditional Probability question

The question gives us: P(positive test | drug user) = 0.91 P(positive test | not a drug user) = 0.01 P(drug user) = 0.10 The question asks for: P(not a drug user | positive test). I was saying that it seemed you were implying the answer is .09 because 1-0.91 = 1-P(positive test | drug user) =...
15. ### Test priori power - Welch T test

What gave you the impression you couldn't do the power calculation in R? https://www.rdocumentation.org/packages/MESS/versions/0.4-3/topics/power.t.test
16. ### Conditional Probability question

I disagree. The .91 from the problem is P(Test positive | drug user). The question is asking for P(not a drug user | Test positive). Your reply makes it seem like you're arguing that P(A|B) = P(B|A) which is not true in general.
17. ### Question on distribution (newsagent profit problem)

If n=1 could you find the expected profit?
18. ### HYPOTHESIS TESTING

I'm not sure what editor is getting at but thinking about what the distribution of the test statistic looks like under the null and thinking about what it looks like under the alternative sheds light on this. If you're making a test you want it to reject the null when the observed data matches...
19. ### A

There is definitely too much information presented. Could you try giving us less.
20. ### Conditional Probability question

Bayes theorem is a good idea here. Can you show what you tried.