If mean and standard deviation of 100 items are 50 and 4 respectively the find the sum of all the item and the sum of the squares of item.

Mean and standard deviation of 100 items are 50 and 4, respectively . Find the sum of all the item and the sum of the squares of the items.

Mean and standard deviation of 100 items are 50 and 4 respectively. The sum of all squares of the items is

If the men and standards deviation of 100 observations are 50 and 4 respectively. Find the sum of all the observations and the sum of their squares.

If the men and standards deviation of 100 observations are 50 and 4 respectively.Find the sum of all the observations and the sum of their squares.

Mean of 100 items is 50 and their S.D. is 4. Find the sum of all the items and also the sum of the squares of the items.

Mean of 100 items is 48 and their standard deviation is 10 . Find the sum of all the itmes and the sum of the squares of all items.

The arithmetic mean and standard deviation of a set of 9 items are 43 and 5 respectively , If an item of value 63 is added to that set , find the new mean and standard deviation of 10 item set given

The mean and standard deviation of 20 items are found to be 10 and 2 respectively. At the time of checking it was found that an item 12 was wrongly entered as 8 . Calcualte the correct mean and standard deviation.