construct both a ungrouped & grouped frequency distribution for the data given below 207 211 204 208 202 203 211 202 205 212 210 212 204 199 204 201 213 200 204 207

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Putting the data in order we get:

199,200,201,202,202,203,204,204,204,204,205,207,207,208,
210,211,211,212,212,213

The ungrouped frequency distribution:

199   1
200   1
201   1
202   2
203   1
204   4
205   1
207   2
208   1
210   1
211   2
212   2
213   1

A grouped frequency distribution (not using class boundaries)

199-201  2
201-203  3
203-205  5
205-207  1
207-209  3
209-211  1
211-213  4
213-215  2

(The class boundaries would be 198.5-201.5 etc...)

**The grouped frequency uses a class size of 2; you could use a class size of 3 giving you 5 classes. This would be the smallest number of classes usually recommended. **

 

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