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in Statistics by (47.6k points)
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The time required for students to do a science experiment and the number of students is shown in the following grouped frequency distribution table. Show the information by a histogram and also by a frequency polygon.

Time required for experiment (minutes)  20-22 22-24 24-26 26-28 28-30 30-32
No. of Student  8 16 22 18 14 12

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Histogram  also by a frequency polygon given below.  

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