The arithmetic mean of consumption expenditures for 5 members is Rupees 40, with standard deviation of Rupees 7. Three new members are added, and their consumption expenditures (in Rupees) are 30, 35, and 40. Then, the standard deviation of consumption expenditures of these 8 members is ________ (rounded off to two decimal places).
IIT JAM 2026 Question 43: Descriptive statistics and dispersion
Answer and worked solution
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Descriptive statistics and dispersion has come up 117 times in 6 exams since 2004.
What this question tests
This question is on Robustness, standardisation and recovering summary measures, part of Descriptive statistics and dispersion in Statistics.
How summary measures react to outliers and corrections, and working backwards from them.
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