The lengths of randomly selected -day-old babies were measured and the following data…

MATHEMATICS · Multi-part · CBSE · Mathematics · Statistics · Statistics

Problem

The lengths of 3030 randomly selected 1212-day-old babies were measured and the following data were obtained. Estimate:
Length ll (cm)Frequency
40≤l<4240\leq l<4211
42≤l<4442\leq l<4411
44≤l<4644\leq l<4633
46≤l<4846\leq l<4877
48≤l<5048\leq l<501111
50≤l<5250\leq l<5255
52≤l<5452\leq l<5422
(1) Mean. (2) Standard deviation.

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