Help writing hypotheses!

[hlsmith]

View attachment 4171

correlation and p values

We appreciate you are interested in stats. Though, I will note that a failure to reject a null hypothesis at a set alpha is not evidence towards the null being true. As noted it could be a sample size issue. To formally test a null value, a threshold is usually stated for a margin of similarity (e.g., equality test).

I will also second that a pvalue associated with a correlation does not provide information on the correlation value, but is a frequentist statement about if you repeated the study.



Also, to the OP - constructing a scatterplot may be beneficial as well!

 

[AngleWyrm]

Statistics Knowledge Portal

When a p-value is used to describe a result as statistically significant, this means that it falls below a pre-defined cutoff (e.g., p <.05 or p <.01) at which point we reject the null hypothesis in favor of an alternative hypothesis

corellation(x,y) = covariance(x,y) / standard deviation(x) * standard deviation(y)

 

[Dason]

Statistics Knowledge Portal


View attachment 4177

What do you see is the relationship between what you quoted and the image you posted?

 

[katxt]

corellation(x,y) = covariance(x,y) / standard deviation(x) * standard deviation(y)

You may need a couple of brackets in there as well.

 

[AngleWyrm]

You may need a couple of brackets in there as well.

yes, the two standard deviations are part of the denominator. The MATH thing doesn't seem to be translating LaTex.

 

[Dason]

And how do you think the formula for correlation is related to the earlier discussion? Please answer this question.

 

[fed2]

i think anglewyrms bs is just a variation on the general theme of bs.