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Statistics · UPSC CDS/OTA · Question 28 of 33

Statistics : Find the mean for grouped data with classes 0–10,10–20,20–30,30–40 and frequencies 5,9,7,4 (use class midpoints).

Step-by-step solution. Statistics for UPSC CDS/OTA.

Topic
Statistics
Subject
Mathematics
Difficulty
Moderate
Solve Time
45-60 sec

Solved UPSC CDS/OTA Question

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Q · Statistics Moderate · 45s

Find the mean for grouped data with classes 0–10,10–20,20–30,30–40 and frequencies 5,9,7,4 (use class midpoints).

TopicStatistics
Question Typemultiple choice
DifficultyModerate
Marking+1 / −0.33
Test Duration30 min

Step-by-Step Solution

The complete worked solution.

Every step explained - no skipped algebra.

x̄ = Σf·mid / Σf = 19.00.

Final Answer: Option B - 19.00
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Find the mean for grouped data with classes… - Statistics (Mathematics) Solved Question