Variance & Standard Deviation of Grouped Data

Calculate mean,Variance and Standard Deviation for the following distribution.

Find the mean,variance and standard deviation of first n natural numbers.

Find the variance and standard deviation of the following data : 4,6,10,12,14,18,20

Calculate variance and standard deviation of the following data : 10 , 12 , 8 , 14 , 16 .

The CAT scores of 60 students are summarized below: {:("Class ",40-50,50-60,60-70,70-80,80-90,90-100),("Frequency"," "10," "8," "12," "15," "10,"5):} Calculate the sample mean,the sample variance and the standard deviation for the grouped data

OMR|Another Formula For Standard Deviation|Questions|Shotcut Method To Find Variance And Standard Deviation|Questions

OMR|Another Formula For Standard Deviation|Questions|Shotcut Method To Find Variance And Standard Deviation|Questions