Question

The average yearly Medicare Hospital Insurance benefit per person was $4064 in a recent year. If the benefits are normally distributed with a standard deviation of $425, find the probability that the mean benefit for a random sample of 36 patients is less than $3800.

Answer 1

It is about 0.27. I can't explain, no joke I'm studying for algebra 2 to skip it over the summer and I happened to have just read about it and I had my graphing calculator right next to me