R: how to find x given the value of qnorm(x)=-2
Question
Given the value of qnorm(x)=-2, how to find x using R? I'm trying to solve the power 1-beta from the value of qnorm(1-beta). Thank you.
1 answers
solution1
0 ACCPTED 2020-11-22 18:54:08
The pnorm function serves as the inverse for qnorm . Ergo
> pnorm(qnorm(0.5))
[1] 0.5
So to your question
> pnorm(-2)
[1] 0.02275013
> qnorm(0.02275013)
[1] -2
> 1 - pnorm(-2)
[1] 0.9772499
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