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Consider the following relative frequency distribution of the result of Basic Programming final exam taken by 120 students. Select the percentage (approximate) of normally distributed

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Consider the following relative frequency distribution of the result of Basic Programming final exam taken by 120 students. Select the percentage (approximate) of normally distributed data lies within one standard deviation of the mean. Grade Less 50-59 60-69 70-79 80-89 90-100 than 50 Cumulative 15% 10% 30% 25% 15% 5% Frequency a. 68% b. 99.7% C. 95% d. 72%

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