Answer: Increases by k.
- A Remains the same
- B Increases by k
- C Multiplies by k
- D Becomes 0
Correct answer: B. Increases by k
Explanation: Mean shifts by the constant. New mean = original mean + k.
In a perfectly normal (bell-shaped) distribution, mean, median, and mode all coincide at the centre; about 68% of data falls within 1 standard deviation of the mean, 95% within 2, and 99.7% within 3 - the empirical rule used to judge how typical or extreme a value is.
Concept context
Mean, median, mode, standard deviation, and data interpretation