I am confused about the alpha. I saw an alpha symbol when I was reading a reference material about p-value, but I remember there is something called Cronbach’s alpha. I am not sure what is the difference between these alphas?

Welcome.

I see, thank you.

The threshold (e.g., .05), the largest P-value tolerated for rejecting a true null hypothesis, is called the significance level, α; whereas Cronbach’s alpha is a measure of internal consistency, that is, how closely related a set of items are as a group. Technically speaking, Cronbach’s alpha is not a statistical test – it is a coefficient of reliability (or consistency).