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Statistics — MATHEMATICS STD 9 — Question

ICSE BoardEnglish MediumSTD 9MATHEMATICSStatistics5 Marks
Question
From the cumulative frequency distribution given below, construct a frequency distribution table:
Marks $c.f.$
Less than $10$ $10$
Less than $20$ $18$
Less than $30$ $32$
Less than $40$ $45$
Less than $50$ $50$
✓

Answer

Class $c.f.$ Frequency
$0 - 10$ $10$ $10$
$10 - 20$ $18$ $18 - 10 = 8$
$20 - 30$ $32$ $32 - 18 = 14$
$30 - 40$ $45$ $45 - 32 = 13$
$50 - 60$ $50$ $50 - 45 = 5$

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