2016 · Q92
The mean and median of 5 observations are 9 and 8 respectively. If 1 is subtracted from each observation, then the new mean and the new median will respectively be
Elementary MathematicsStatistics
- A8 and 7
- B9 and 7
- C8 and 9
- DCannot be determined due to insufficient data
Explanation
Subtracting a constant from every observation shifts the mean by that constant. It shifts the median by the same constant. Thus the new mean is 9−1 = 8 and the new median is 8−1 = 7, option A.