Confidence Interval: getting "NA" as an answer. Why?

Machine Learning and Modeling
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5

There is not help variable in this data but one in your formula.

Se also Best Practices: how to prepare your own data for use in a `reprex` if you can’t, or don’t know how to reproduce a problem with a built-in dataset?

You'll find some insight on how to provide data. However, what you did is ok. I was able to copy and use datapasta::tribble_paste to get a usable data for R.