The mean and standard deviation of observations are found to be and , respectively. On rechecking, an observation was mistakenly taken as instead of . The correct standard deviation is:
- A
- B
- C
- D
The mean and standard deviation of observations are found to be and , respectively. On rechecking, an observation was mistakenly taken as instead of . The correct standard deviation is:
Sign in to reveal the correct answer, the full step-by-step solution, and the common mistakes for this question.
Get unlimited AI-adaptive practice, mastery tracking, and an AI tutor that explains every step - free to start.