Here is a statistics question

Question

I just need to know how to find the class boundaries and am done with the other questions that's follows

Class group
1.7-2.9
2.0-2.2
2.2-2.5
2.6-2.8
2.9-3.1

Can somebody just explain how to find the class boundaries

Answer 1

To find the class boundaries, you need to add and subtract 0.5 from the lower and upper limits of each class interval. For example:

Lower limit of 1st class: 1.7
Upper limit of 1st class: 2.9
Class width: 2.9 - 1.7 = 1.2

Class boundaries of 1st class:
Lower boundary = 1.7 - 0.5 = 1.2
Upper boundary = 2.9 + 0.5 = 3.4

Similarly, you can find the class boundaries for the rest of the class intervals.

Class boundaries:
1.2 - 2.4
1.5 - 2.7
1.7 - 3.0
2.1 - 2.9
2.4 - 3.2