Find the mean and standard deviation of the following frequency distribution. (5) Class Intervals Frequency 6.45 – 7.25 7.25 – 8.05 8.05 – 8.85 8.85 – 9.65 9.65 – 10.45 10.45 – 11.25 11.25 – 12.05 12.05 – 12.85 12.85 – 13.65 7 11 34 67 62 67 33 13 6 Total 300
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