Find the mean of 994,996,998,1002 and 1000.
Mean=¯x=994+996+998+1002+10005 (Here n=5)=49905=998
The mean of marks scored by 100 students was found to be 40.Later on its was discovered that a score of 53 was misread as 83.Find the correct mean.
Find the sum of the deviations of the variate values 3,4,6,7,8,14 from their mean.
If M is the mean of x1,x2,x3,x4,x5 and x6,prove that (x1−M)+(x2−M)+(x3−M)+(x4−M)+(x5−M)+(x6−M)=0
The mean of 200 items was 50.Later on,it was discovered that the two items were misread as 92 and 8 instead of 192 and 88.Find the correct mean.
The mean weight of 8 numbers is 15.If each number is multiplied by 2, what will be the new mean ?