Question

are they all same...and their formula?!

Answer 1

They are not same.

Consider the following classes:

1-9
10-19
20-29
30-39
40-49
50-59

Class size and class width are same. it can be found by subtracting eitger two consecutive lower limits or upper limits.

class width = 50-40 = 10
or 39 - 29 =.10

Class interval is defined within one class.
class interval = upper limit - lower limit = 19-10 = 9

Range means the entire range in which the data falls. here range is 59 - 1 = 58

Answer 2

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no they are not same....

✔class size= upper limit-lower limit

✔class interval :- like 0-10, 10-20, 20-30

✔class width and class size are the same

✔range:- highest observation - lowest observation

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