Question 9
Find the mean, variance and standard deviation using short-cut method Height 70-75 75-80 80-85 85-90 90-95 95-100 100-105105-110 110-115 in cms No. of 3 4 7 7 15 9 6 6 3 children
SOLUTION
→→→→
Find the mean, variance and standard deviation using short-cut method Height 70-75 75-80 80-85 85-90 90-95 95-100 100-105105-110 110-115 in cms No. of 3 4 7 7 15 9 6 6 3 children