13. According to the 68%-95%-99.70% rule, the standard deviation and mean interval that covers approximately 99.70% of the data from a frequency distribution is_ A. 2u ± 20 14. The first quarterly assessment result of Grade 11- STEM students in their Statistics and Probability subject had scored with a mean of 40 and a standar deviation of 8. A histogram of the data shows that the distribution is normal. Use the Empirical Rule to find the percentage of scores between 24 and 48. B. uto C. u± 20 D. μ1 30 12. 5% B 68% C 81 5% D 95%

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