Statisticsmedium · Past Paper
Mean of 100 observations is 50. If one observation 50 is replaced by 150, the new mean is:
A50
B51
C52
D60
✓ Correct Answer: B — 51
Increase in sum = 150 - 50 = 100. Increase in mean = 100 / 100 = 1. New mean = 51.
Share this question
More from Statistics
- If a fair coin is flipped, what is the probability it lands on neither heads nor tails?
- What is the probability of getting a sum of at least 11 when two dice are rolled?
- In a pie chart representing marks (Total = 600), Science marks are 120. What is the angle?
- If Σf = 100, and the median is found at the 50th position, what is the value of N/2 used in the continuous median formula?
- If P(A) = 0.5, P(B) = 0.3, and events A and B are independent, find P(A and B).