Statisticshard · Past Paper
A student's marks in 5 subjects are 70, 75, 80, 85, and 90. What is the mean absolute deviation about the mean?
A6
B80
C30
D10
✓ Correct Answer: A — 6
Mean = 80. Deviations from 80 are: |-10|, |-5|, |0|, |5|, |10|. Sum = 30. Mean Deviation = 30/5 = 6.
Share this question
More from Statistics
- In a class, the probability of a student passing in Math is 0.8 and in Science is 0.7. If the probability of passing both is 0.6, what is the probability of passing in at least one?
- If a data set has two modes, it is called:
- What is the arithmetic mean of the first five natural numbers?
- If a number is chosen from 1 to 5, what is the probability it is 3?
- If the frequencies of classes 0-10, 10-20, 20-30 are 5, 8, 7, what is the 'more-than' cumulative frequency for class 10?