Q6 of 40 Page 935

Using short cut method, find the mean, variation and standard deviation for the data :

To find: MEAN



Now,



=100


To find: VARIANCE





= 29.09


To find: STANDARD DEVIATION




= 5.39


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Using short cut method, find the mean, variation and standard deviation for the data :

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Using short cut method, find the mean, variation and standard deviation for the data :

 8

Using short cut method, find the mean, variation and standard deviation for the data :























Class



30-40



40-50



50-60



60-70



70-80



80-90



90-100



Frequency



3



7



12



15



8



3



2