1.

The scores of 48 children in an intelligence test are shown in the followingfrequency table . {:("Score ",71,76,79,83,86,89,92,97,101,103,107,110,114),("Frequency ",4,3,4,5,6,5,4,4,3,3,3,2,2):} Calculate sigma^(2) and find the percentage of students whose score lie between bar(x) - sigma and bar(x) + sigma

Answer»


ANSWER :`140.71; 64.58%`


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