Consider the data in the following frequency distribution. Assume the data represent a population. | Class | Frequency | | :--- | :--- | | 2-6 | 5 | | 7-11 | 6 | | 12-16 | 4 | | 17-21 | 7 | For the above data, determine the following measures. (Round your answers to two decimal places.) (a) the mean (b) the variance (c) the standard deviation
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Midpoint = (Lower limit + Upper limit) / 2 Midpoint for 2-6 = (2+6) / 2 = 4 Midpoint for 7-11 = (7+11) / 2 = 9 Midpoint for 12-16 = (12+16) / 2 = 14 Midpoint for 17-21 = (17+21) / 2 = 19 Show more…
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