Question: A grouped data is catigurized with 3 classes: 7-11, 12-16, 17-21, the best estimate of the first class is: O a. 4.5 O b.

A grouped data is catigurized with 3 classes: 7-11, 12-16, 17-21, the

A grouped data is catigurized with 3 classes: 7-11, 12-16, 17-21, the best estimate of the first class is: O a. 4.5 O b. 12.5 O . 7 O d. 9

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