KASNEB CPA Foundation Level (Kenya) · Business Mathematics and Statistics

Descriptive statistics and counting

17 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 17 questions

  1. The daily sales (in thousands of shillings) of a kiosk over 8 days were 25, 50, 24, 27, 40, 51, 44, 43. What is the mean daily sales?
  2. The daily sales (in thousands of shillings) of a kiosk over 6 days were 53, 49, 42, 30, 53, 43. What is the mean daily sales?
  3. The daily sales (in thousands of shillings) of a kiosk over 7 days were 46, 41, 13, 57, 48, 57, 53. What is the mean daily sales?
  4. The daily sales (in thousands of shillings) of a kiosk over 7 days were 31, 30, 45, 58, 53, 25, 17. What is the mean daily sales?
  5. The daily sales (in thousands of shillings) of a kiosk over 6 days were 51, 30, 59, 25, 42, 27. What is the mean daily sales?
  6. Find the standard deviation of the data 4, 6, 8, 10, 12, correct to 2 decimal places (use the population formula).
  7. Find the standard deviation of the data 2, 3, 7, 8, 10, 12, correct to 2 decimal places (use the population formula).
  8. Find the standard deviation of the data 5, 5, 9, 13, 18, correct to 2 decimal places (use the population formula).
  9. A set of data has mean 50 and standard deviation 5. What is the coefficient of variation?
  10. Which measure of central tendency is least affected by extreme values?
  11. The modal class of a grouped distribution is the class with
  12. A committee of 4 is to be chosen from 8 candidates. In how many ways can this be done?
  13. A committee of 4 is to be chosen from 12 candidates. In how many ways can this be done?
  14. A committee of 5 is to be chosen from 12 candidates. In how many ways can this be done?
  15. How many different 3-letter codes can be formed from 5 distinct letters if no letter is repeated and order matters?
  16. A manager must award first and second prizes to two of 6 staff. In how many ways can this be done?
  17. How many different 3-letter codes can be formed from 7 distinct letters if no letter is repeated and order matters?

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