rnormal-distribution
How do I solve for a variable in a standard normal distribution using R?
I'm trying to solve this expression using R and I have no clue.
P(Z >= c) = 0.025
I found P(Z < c) = 0.975 using the complement rule but do not know how to proceed further.
Solution
If you have the cumulative distribution function (CDF), think about the inverse.
Here, p = 0.975.
Fortunately, other people have already built functions like these. Compare the definition of the inverse CDF to the quantile function for insights into why the letter q is used by some packages.
I'll leave the rest up to you.
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