NCERT Miscellaneous Exercise Q5 - Statistics
Question: For 20 observations, mean 10 and standard deviation 2 were obtained using 8 incorrectly. Find corrected values when 8 was (i) omitted, (ii) replaced by 12.
Answer: Recompute the total and squared total for each corrected data set before finding the new mean and standard deviation.
Full step-by-step NCERT solution with diagrams on Something by Zero.