CMA Foundation · Fundamentals of Business Mathematics and Statistics · Measures of Central Tendency and Dispersion
For the data below, what is the arithmetic mean of daily output? Output: 10, 20, 30, 40 units with frequencies 5, 8, 4, 3 respectively.
The mean is 22.5 units, calculated as total of frequency times output, 450, divided by total frequency, 20.
- A22
- B23Correct
- C24
- D25
Explanation
Σf = 20. Σfx = 50+160+120+120 = 450. Mean = 450/20 = 22.5, which is not listed exactly; the option nearest is not valid.
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