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Handling Data and Statistics Flashcards

6 cards from real BKSB practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Handling Data and Statistics flashcards as text

  1. A small cafe sells the following number of sandwiches over a 5-day period: Monday - 25, Tuesday - 30, Wednesday - 28, Thursday - 32, Friday - 40. What is the mean (average) number of sandwiches sold per day?

    Answer: 31

    The mean is calculated by adding all the values together (25 + 30 + 28 + 32 + 40 = 155) and dividing by the number of values (5). 155 divided by 5 is 31.

  2. A bar chart shows a company's quarterly sales: Quarter 1: £45,000, Quarter 2: £60,000, Quarter 3: £55,000, Quarter 4: £70,000. Which of the following statements is a correct interpretation of the data?

    Answer: Sales in Quarter 2 were higher than in Quarter 3.

    According to the data, Quarter 2 sales were £60,000 and Quarter 3 sales were £55,000. Therefore, the statement that sales in Quarter 2 were higher than in Quarter 3 is correct.

  3. A delivery driver records the following delivery times in minutes for one afternoon: 15, 22, 18, 25, 12, 18, 20. What are the range and the median of these delivery times?

    Answer: Range: 13, Median: 18

    To find the range, subtract the smallest value from the largest value (25 - 12 = 13). To find the median, first order the numbers (12, 15, 18, 18, 20, 22, 25) and find the middle value, which is 18.

  4. An office has 50 employees. It is known that 5 employees have not completed their mandatory health and safety training. If an employee is selected at random, what is the probability that they have NOT completed the training?

    Answer: 1 in 10

    Probability is calculated by dividing the number of specific outcomes (5 employees who have not completed training) by the total number of possible outcomes (50 employees). The fraction 5/50 simplifies to 1/10.

  5. A pie chart shows a department's weekly expenditure: 50% on Salaries, 25% on Materials, 15% on Utilities, and 10% on Miscellaneous. Which of the following statements is true?

    Answer: Twice as much is spent on Salaries as is spent on Materials.

    The chart shows 50% is spent on Salaries and 25% is spent on Materials. Since 50% is double 25%, the statement that twice as much is spent on Salaries as on Materials is correct.

  6. A manager is reviewing the number of sick days taken by 9 employees in the last year. The data is as follows: 2, 7, 3, 7, 8, 4, 7, 3, 5. What is the mode of this data set?

    Answer: 7

    The mode is the number that occurs most often in a set of data. In the list provided, the number 7 appears three times, which is more frequent than any other number.