Answer:
A. 4
Explanation:
In this question first form a frequency table where you have a section for the class intervals and another section for the frequency. Then select the value for the frequency that is located where the interval is 5-7. The interval will start with 2-4 and increase by 2 in to the next class interval. The sum of frequency should add to the number of data set given.
Class intervals frequency{f}
2-4 6
5-7 4
8-12 3
13
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