Subject
Mathematics
Topic
Statistics
Subtopic
Standard deviation
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Standard deviation is defined as sqrt(variance).…
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This question focuses on the concept of Standard deviation under the broader topic of Statistics.
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Saba Noor
If all observations are equal, their variance is:
The median of 1, 3, 5, 7, 9 is:
The arithmetic mean of 2, 4, 6, 8 is:
If the average of 5 students is given and one student leaves, how is the new average calculated?
The average of 5, 10, 15, and x is 20. What is the value of x?
Mean of 5 numbers is 18. Four numbers are 16, 18, 14, and 22. The 5th number is:
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Source
FPSC Mathematics Lecturer syllabus-aligned practice; answer verified mathematically; not an official past-paper extraction
Reviewed
18 May 2026
Updated
31 Aug 2026