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WAEC (WASSCE) Mathematics · Statistics and Probability

Statistics: WAEC Mathematics Past Questions and Answers

What the WAEC syllabus covers in Statistics

Our summary: Organising data into tables and charts and summarising it with averages and spread.

  • Frequency distribution
  • Pie charts, bar charts, histograms and frequency polygons
  • Mean, median and mode for both discrete and grouped data
  • Cumulative frequency curve (Ogive)
  • Measures of Dispersion: range, semi-interquartile/interquartile range, variance, mean deviation and standard deviation

Syllabus content © The West African Examinations Council (WASSCE (harmonised West African syllabus)).

WAEC (WASSCE) Mathematics questions on Statistics

  1. WAEC 2024Find the range of the following set of numbers: 28, 29, 39, 38, 33, 37, 26, 20, 15, and 25.
  2. WAEC 2024The following are the masses (in kg) of members in a club: 59, 44, 53, 49, 57, 40, 48, and 50. Calculate the variance of the distribution.
  3. WAEC 2024The following are the masses (in kg) of members in a club: 59, 44, 53, 49, 57, 40, 48, and 50. Calculate the mean mass.
  4. WAEC 2023Find the mean deviation of assets of numbers: 14, 15, 16, 17, 18, and 19.
  5. WAEC 2022The age (years) of some members in a singing group are: 12, 47, 49, 15, 43, 41, 13, 39, 43, 41 and 36. Find the lower quartile
  6. WAEC 2022The age (years) of some members in a singing group are: 12, 47, 49, 15, 43, 41, 13, 39, 43, 41 and 36. Find the mean
  7. WAEC 2022The mean of two numbers x and y is 4. Find the mean of four numbers x, 2x, y and 2y
  8. WAEC 2022The mean of a set of 10 numbers is 56. If the mean of the first nine numbers is 55, find the 10th number.
  9. WAEC 2021find the first quartile of 7,8,7,9,11,8,7,9,6 and 8.
  10. WAEC 2021Find, correct to two decimal, the mean of 1 1/2 , 2 2/3 , 3 3/4 , 4 4/5 , and 5 5/6 .
  11. WAEC 2021Height(cm) 160 161 162 163 164 165 No. of players 4 6 3 7 8 9 the table shows the height of 37 players of a basketball team calculates correct to one decimal…
  12. WAEC 2020The mean of the numbers 15, 21, 17, 26, 18, and 29 is 21. Calculate the standard deviation
  13. WAEC 2020The interquartile range of distribution is 7. If the 25th percentile is 16, find the upper quartile.
  14. WAEC 20198, 18, 10,14, 18, 11, 13, 14, 13, 17, 15, 8, 16, and 13 The following are scores obtained by some students in a test. How many students scored above the mean…
  15. WAEC 2019The following are scores obtained by some students in a test. Find the median score 8 18 10 14 18 11 13 14 13 17 15 8 16 13
  16. WAEC 2019Calculate the variance of 2, 4, 7, 8 and 9
  17. WAEC 2019The following are scores obtained by some students in a test, Find the mode of the distribution 8 18 10 14 18 11 13 14 13 17 15 8 16 13
  18. WAEC 2018The mean of 1, 3, 5, 7 and x is 4. Find the value of x
  19. WAEC 2018Find the inter-quartile range of 1, 3, 4, 5, 8, 9, 10, 11, 12, 14, 16
  20. WAEC 2018Find the mean deviation of 20, 30, 25, 40, 35, 50, 45, 40, 20 and 45
  21. WAEC 2018Find the median of 2, 1, 0, 3, 1, 1, 4, 0, 1 and 2
  22. WAEC 2017Calculate the variance of 2, 3, 3, 4, 5, 5, 5, 7, 7 and 9
  23. WAEC 2017Marks 0 1 2 3 4 5 Frequency 7 4 18 12 8 11 The table gives the distribution of marks obtained by a number of pupils in a class test. Using this information…
  24. WAEC 2017Marks 0 1 2 3 4 5 Frequency 7 4 18 12 8 11 The table gives the distribution of marks obtained by a number of pupils in a class test. Using this information…
  25. WAEC 2017The average age of a group of 25 girls is 10year. If one girl, aged 12 years and 4 months joins the group, find the new average age of the group
  26. WAEC 2016The marks of eight students in a test are: 3, 10, 4, 5, 14, 13, 16 and 7. Find the range
  27. WAEC 2016c c Age(years) 13 14 15 16 17 Frequency 10 24 8 5 3 Find the median age
  28. WAEC 2015The scores of twenty students in a test are as follows: 44, 47, 48, 49, 50, 51, 52, 53, 53, 54, 58, 59, 60, 61, 63, 65, 67, 70, 73, 75. Find the third quartile.
  29. WAEC 2015Which of the following is used to determine the mode of a grouped data?
  30. WAEC 2015Calculate the mean deviation of 5, 3, 0, 7, 2, 1
  31. WAEC 2015Score 0 - 4 5 - 9 10 - 14 Frequency 2 1 2 The table shows the distribution of the scores of some students in a test. Calculate the mean scores.
  32. WAEC 2015The population of students in a school is 810. If this is represented on a pie chart, calculate the sectoral angle for a class of 72 students
  33. WAEC 2014Which of the following is a measure of dispersion?
  34. WAEC 2014In a cumulative frequency graph, the lower quartile is 18 years while the 60th percentile is 48 years. What percentage of the distribution is at most 18 years…
  35. WAEC 2014c c height 2 3 4 5 6 frequency 2 4 5 3 1 The table shows the distribution of the height of plants in a nursery. Calculate the mean height of the plants.
  36. WAEC 2012Given that the mean of the scores 15, 21, 17, 26, 18 and 29 is 21, calculate the standard deviation of the scores
  37. WAEC 2010The mean age of R men in a club is 50 years, Two men aged 55 and 63, left the club and the mean age reduced by 1 year. Find the value of R
  38. WAEC 2010The mean of the numbers 2, 5, 2x and 7 is less than or equal to 5. Find the range of the values of x

Years with Statistics questions in DeeepSolve's question bank

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