NCERT Miscellaneous Exercise Q6 - Statistics
Question: For 100 observations, the mean and standard deviation were 20 and 3. Three incorrect observations, recorded as 21, 21 and 18, are to be omitted. Find the corrected mean and standard deviation.
Answer: Corrected mean = 20 and corrected standard deviation approximately 3.04.
Full step-by-step NCERT solution with diagrams on Something by Zero.