Question

The average male drinks 2L of water when active outdoors (with a standard deviation of 0.7L). You are planning a full day nature trip for 50 men and will bring 110L of water. What is the probability that you will run out?

I believe the answer should be .0217, but i cant figure out how to do it in the calculator.

I'm using normalcdf(110, infinity, 2, .099) and i keep getting 0, pls help!

Answer 1

We are given, σ 0.7 P (x bar> 2.2) x2 bar 110/50 Calculator: normalcdf(2.2, infinity, 2,.099) Excel formula: -1-NORMDIST(2.2,2,0.099,TRUE) 0.0217 2 0.7/N50 0.099