Answer
approximate 68% of the population fall in [273,347] when k=1
approximate 95% of the population fall in [236,384] when k = 2
approximate 99.7% of the population fall in [199,421] when k = 3
Work Step by Step
Interval:
x`+-1s = 310+- 1(37) = [273,347]
x`+-2s = 310+- 2(37) = [236,384]
x`+-3s = 310+- 3(37) = [199,421]
