For normally distributed data, approximately what percent of scores will fall between -3 to 0 standard deviations (the mean)?

- - - - - - - - - - - - - - - - - - - - - u-30 M- 20 M-O uto M+20 1+30 For normally distributed data, approximately what percent of scores will fall between -3 to O standard deviations (the mean)? 2% O 14% 34% O 50%