Undestanding p-value and '***'

Question

I have a dilemma regarding significance in r. I don't really understand something. For example if I have:

Does it show a significant relationship? Because the p-value seems to be greater than 0.05, but actually there are "***". Hope you can make me understand that. I'am not that familiar with [Tag:R,] I used to work with SPSS, it wasn't actually like here. Thanks!

The p value is _much_ less than 0.05 here. This is scientific notation, so 1.01e-14 means 1.01 * 10^(-14) or 0.0000000000000101. — Allan Cameron, Mar 01 '20 at 13:24
Thank you very much, so that's why *** are there. Thank you! — Cristi Chiticariu, Mar 01 '20 at 13:26

DJV · Accepted Answer · 2020-03-01T13:28:55.647

3

By default R uses the scientific notation. For example, p-value of 0.05 will be represented as 5e-2 (you can type it in console).

You can change the default by typing options(scipen = 999). In addition, you can set the number of digits to round automatically using options(digits = 3).

For a very easy to understand explanation on how scientific notation works, you can look here.

edited Mar 01 '20 at 13:28

answered Mar 01 '20 at 13:27

DJV

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I get it now, forever, finally :)). Thank you! – Cristi Chiticariu Mar 01 '20 at 13:28
That's ok, I was also confused by this for some time :) – DJV Mar 01 '20 at 13:30

Undestanding p-value and '***'

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