Question

the class marks of the observations are 17,21,25,29,33,37,41,45 find the class intervals ​

Answer 1

Answer:

class intervals is 4

because ever digit give 4digit space

Answer 2

The class intervals are 15-19,19-23,23-27,27-31,31-35,35-39,39- 43,43-47

Step-by-step explanation:

we can observe that 21-17 = 4

25-21 = 4 .. and so on

hence , the class size is 4

now  the difference between the values of two consecutive class marks is 4, therefore we subtract 4/2 = 2 from each class mark to get the lower limit of the corresponding class interval and add 4 to each class mark to get the upper limit.

therefore ,

the class intervals are

15-19

19-23

23-27

27-31

31-35

35-39

39- 43

43-47

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