Question: 2.7 Construct a histogram and a frequency polygon for the following data: Class Interval Frequency 10under 20 9 20under 30 7 30under 40 10 40under

2.7 Construct a histogram and a frequency polygon for the following data: Class Interval Frequency 10–under 20 9 20–under 30 7 30–under 40 10 40–under 50 6 50–under 60 13 60–under 70 18 70–under 80 15

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