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5 point Q.7.- Refer to the following data set that shows the class interval (and frequency in parentheses): {0-5 (20); 5-10 (30); 10-15 (50); 15–20 (40); 20- 25 (10);25–30 (20) Construct a frequency histogram, Polygon and more than ogive using the above data. Add file |
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Answer» Class intervals FREQUENCY 10-20 7 20-30 12 30-40 20 40-50 11 50-60 8Here maximum frequency is 20 ,the class corresponding to this 30-40So MODAL class is 30-40Now lower limit of modal class (l)=30Frequency (f1) of modal class =20frequency (f0) of preceding the modal class =12frequency (f2) of the class SUCCEEDING the modal class=11Class size=10 Mod=l+[ 2f1−f0−f2f1−f0 ]×hMod =30+[ 2×20−12−1120−12 ]×10=30+ 178 ×10=30+4.705=34.705 |
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