According to the empirical rule, approximately what percent of the data should lie within $\mu \pm2\sigma$?_______

According to the empirical rule, approximately what percent of the dat

1.	According to the empirical rule, approximately what percent of the data should lie within $\mu \pm2\sigma$?_______
A.	75%
B.	68%
C.	99.7%
D.	90%
Answer» D. 90%