Question: Find the variance of the data summarized in this table using the formula (assume population) (4 marks) Mass Interval Frequency [60,70) 4 [70,80) 6 [80,90)

Find the variance of the data summarized in this table using the formula (assume population) (4 marks) Mass Interval Frequency [60,70) 4 [70,80) 6 [80,90) 3 [90,100) 8

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