Consider the data in the following frequency distribution. Assume the data represent a population. Class 2-6 7-11 12-16 17-21 Frequency (b) the variance 24.85 X 4 X 7 For the above data, determine the following measures. (Round your answers to two decimal places.) (a) the mean 9.33 8 3 (c) the standard deviation 4.98 X

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