Basic Statistics Flashcards
6 cards from real Civil Service Numerical Reasoning Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Basic Statistics flashcards as text
A team's weekly sales figures are: £8,200; £9,400; £7,800; £10,200; £9,400. What is the median?
Answer: £9,400
Ordered: £7,800; £8,200; £9,400; £9,400; £10,200. Middle value = £9,400.
Seven values: 2, 5, 8, 5, 9, 2, 5. Which value is the mode?
Answer: 5
5 appears three times — more than any other value. The mode is 5.
Scores: 82, 76, 90, 68, 84. What is the mean?
Answer: 80
Sum = 82 + 76 + 90 + 68 + 84 = 400. Mean = 400 ÷ 5 = 80.
Eight values: 3, 7, 7, 9, 11, 13, 15, 19. What is the median?
Answer: 10
With 8 values, median = mean of 4th and 5th: (9 + 11) ÷ 2 = 10.
Temperatures over 5 days: 14°C, 17°C, 11°C, 20°C, 13°C. What is the range?
Answer: 9°C
Range = 20 − 11 = 9.
Annual incomes: £18,000; £22,000; £35,000; £28,000; £40,000; £22,000. What is the mode?
Answer: £22,000
£22,000 appears twice — more than any other value. The mode is £22,000.