1.

Find the mean, variance and standard deviation using short-cutmethod Height in cms No. of children 70-75 3 75-80 4 80-85 7 85-90 7 90-95 15 95-100 9 100-105 6 105-110 6 110-115 3

Answer»

Find the mean, variance and standard deviation using short-cut
method












































Height


in cms



No. of children



70-75



3



75-80



4



80-85



7



85-90



7



90-95



15



95-100



9



100-105



6



105-110



6



110-115



3





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