Question

Marks of 12 student in a unit test are given as 4,21,13,17,5,9,10,20,19,12,20,14. Assume a mean and calculate the arithmetic mean of the data. Assume another number as mean and calculate the arithmetic mean again. Do you get the same result? comment.​

Answer 1

mean= sum of the students marks /total no of students

mean=4+21+13+17+5+9+10+20+19+12+20+14 / 12

mean= 164/12

mean= 13.66