Statisticsmedium · Past Paper
If the mean of five observations x, x+2, x+4, x+6, and x+8 is 11, find the value of x.
A5
B7
C9
D11
✓ Correct Answer: B — 7
Sum = 5x + 20. Mean = (5x + 20)/5 = x + 4. Given x + 4 = 11, so x = 7.
Share this question
More from Statistics
- If a fair coin is flipped, what is the probability it lands on neither heads nor tails?
- In a class of 40 students, 10 failed. What is the angle in a pie chart representing the number of passed students?
- What is the lower limit of the class 10-19 in a discrete frequency distribution converted to continuous?
- A bag contains 4 white and 6 black balls. What is the probability of drawing a black ball?
- What is the mode of the data: 10, 20, 20, 30, 40, 40, 40, 50, 60?