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A sales manager has sampled past sales records to determine how many refrigerators are sold each...

A sales manager has sampled past sales records to determine how many refrigerators are sold each day. Daily records for a sample of 10 days have been selected. The sales on these days are: 0, 4, 4, 2, 1, 3, 4, 5, 2, 7. The mean daily sales is ? . The median is   .? The variance is ?  . The standard deviation is ?  . (round to two decimal points)

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