Statisticsmedium · Past Paper
Calculate the mean of the following discrete data: x=10, f=2; x=20, f=3.
A15
B16
C18
D14
✓ Correct Answer: B — 16
Sum (fx) = (10*2) + (20*3) = 20 + 60 = 80. Sum (f) = 2 + 3 = 5. Mean = 80 / 5 = 16.
Share this question
More from Statistics
- Determine the median of the following observations: 25, 30, 21, 15, 28, 35, 40, 12, 18.
- A bag contains 5 red, 4 green, and 3 blue marbles. What is the probability of drawing a marble that is not red?
- The median of 3, 5, 7, 9, 11, 13 is:
- For a data set where all values are the same (e.g., 7, 7, 7, 7), the variance is:
- What is the arithmetic mean of the first five natural numbers?