Class 11 Computer Science · Chapter 5 · Test 1
Statistics, Dispersion and Probability
43 MCQs Covers mean, median and mode (including calculated examples), variance and standard deviation, and probability with its formula and everyday uses.
43 questions · 35 min · 43 marks
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Sample questions
The first 5 of 43. Try each one, then tap to see the answer.
Question 1
Which of the following is NOT a measure of central tendency?
- AMean
- BVariance
- CMedian
- DMode
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Answer: B
Variance measures dispersion, not the center.
Question 2
The mean of the data set 50, 60, 70, 80, 90 is:
- A60
- B80
- C90
- D70
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Answer: D
(50 + 60 + 70 + 80 + 90) / 5 = 350 / 5 = 70.
Question 3
If the scores are 50, 60, 70, 70, 90, the mode is:
- A70
- B50
- C60
- D90
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Answer: A
70 appears most often.
Question 4
If the scores are 50, 60, 70, 70, 60, 90, the modes are:
- A50 and 60
- B70 and 90
- C60 and 70
- D60 and 90
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Answer: C
60 and 70 each appear twice.
Question 5
The median of 50, 60, 70, 80 is:
- A60
- B65
- C70
- D75
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Answer: B
(60 + 70) / 2 = 65.
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