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Presentation of data — Statistics STD 11 Commerce — Question

Gujarat BoardEnglish MediumSTD 11 CommerceStatisticsPresentation of data4 Marks
Question
Obtain an inclusive continuous frequency distribution from the following data.
Lower boundary point or more than that
$44.5$
$49.5$
$54.5$
$59.5$
$64.5$
$69.5$
$74.5$
$79.5$
Cumulative frequency
$500$
$470$
$390$
$290$
$240$
$90$
$10$
$0$
✓

Answer

For the given data, we get the inclusive continuous frequency distribution as follows :
Lower Boundary point or more More than’ cumulative frequency Cf Class Frequency f
$44.5$ $500$ $45-49$ $500 – 470 = 30$
$49.5$ $470$ $50-54$ $470 – 390 = 80$
$54.5$ $390$ $55-59$ $390 – 290 = 100$
$59.5$ $290$ $60-64$ $290 – 240 = 50$
$64.5$ $240$ $65-69$ $240 – 90 = 150$
$69.5$ $90$ $70-74$ $90 – 10 = 80$
$74.5$ $10$ $75-79$ $10 – 0 = 10$
$79.5$ $0$ $80-84$ $= 0$
$–$ $–$ Total $n = 500$

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