The following table presents the scores of students in Statistics examination Scores Frequency 30 - 39 2 40 - 49 6 50 - 59 60 60 - 69 140 70 - 79 184 80 - 89 135 90 - 99 78 What does the standard deviation say about the scores of the students? Select the correct response: O 68% of the boys have an average difference of about 12 O 95% of the boys have an average difference of about 14 O 99.7% of the boys have an average difference of about 14 O The score the students differ by about 12