class or group upper limit exactly not included in that group
http://www.mathbootcamps.com/making-frequency-distributions-and-histograms-by-hand/
Let’s start with our first group: 12 – 21. We want to count how many points are between 12 and 21 NOT INCLUDING 21. You see the overlap between the groups right? That’s to account for decimals and we keep it even when we don’t have any. The right hand endpoint of any group isn’t included in that group. It goes in the next group. That means 21 would be in the second group and any 30 we have would be counted in the third group.
http://www.mathbootcamps.com/making-frequency-distributions-and-histograms-by-hand/
Let’s start with our first group: 12 – 21. We want to count how many points are between 12 and 21 NOT INCLUDING 21. You see the overlap between the groups right? That’s to account for decimals and we keep it even when we don’t have any. The right hand endpoint of any group isn’t included in that group. It goes in the next group. That means 21 would be in the second group and any 30 we have would be counted in the third group.
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