hi, i need to know what lower and upper bounds of modal class are and how to work it out
upper bound is the highest possible value in that particular class and lower bound is the minimum possible value .
Consider these classes :
1-5 with frequency (20)
so here the modal class is 11-15 and its upper bound , 15.5 and lower bound , 10.5
There are 10 numbers (one decimal place) between 15 and 16 so to be fair , 15 will 'take' 5 and 16 will 'take' 5 .
So you will see that the maximum 15 can take is till 15.5 , 15.6 onwards belong to 16 .
40 is the frequency and it has nothing to do with bounds .