Measurement of Range in Continuous Series
Range= Upper Limit of the Highest Class Interval - Lower Limit of the Lowest Class Interval
Method 2 : Range is the difference of the mid value of the highest class and that of the lowest class.
Range= Mid-Value of the Highest Class Interval - Mid-Value of the Lowest Class Interval
Example : For the following data calculate the range.
Method 2: Range = Mid-Value of the Highest Class Interval - Mid-Value of the Lowest Class Interval
Range = 45 5= 40
Q) In finding the mid value we should use ' + ' sign or ' - ' sign ?
The solution you have presented is wrong as (50-40)/2 = 45 as it should be (50+40)/2 = 45.
it is for both the cases
case 1 :- MID VALUE OF HIGHEST CLASS INTERVAL
case 2 :- MID VALUE OF LOWEST CLASS INTERVAL