The mean and standard deviation of a series of 100 items were found to be 60 and 10 respectively. While calculating, two items were wrongly taken as 5 and 45 instead of 30 and 20. Calculate corrected...

Extracted text: The mean and standard deviation of a series of 100 items were found to be 60 and 10 respectively. While calculating, two items were wrongly taken as 5 and 45 instead of 30 and 20. Calculate corrected variance, standard deviation and coefficient of variation.