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Handling Data and Statistics Flashcards

7 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 7 Handling Data and Statistics flashcards as text

  1. A survey recorded the number of hours 8 students spent studying: 3, 5, 7, 2, 8, 5, 6, 4. What is the median number of hours?

    Answer: 5.5

    When sorted (2,3,4,5,5,6,7,8), the median is the average of the 4th and 5th values: (5+5)/2 = 5.5.

  2. A bar chart shows that 40 people prefer tea, 25 prefer coffee, and 15 prefer juice. What percentage prefer coffee?

    Answer: 31.25%

    Total = 80; coffee percentage = 25/80 × 100 = 31.25%.

  3. A frequency table shows scores: 10 appears 3 times, 20 appears 5 times, 30 appears 2 times. What is the mean score?

    Answer: 19

    Mean = (10×3 + 20×5 + 30×2) / (3+5+2) = (30+100+60)/10 = 190/10 = 19.

  4. Which type of graph is most appropriate for showing how a company's sales changed month by month over one year?

    Answer: Line graph

    A line graph is best for showing trends and changes over a continuous time period.

  5. A data set has values: 4, 4, 7, 9, 11. What is the range?

    Answer: 7

    Range = highest − lowest = 11 − 4 = 7.

  6. In a class of 30 students, a tally chart shows 12 students scored grade A. What fraction of students did NOT score grade A?

    Answer: 3/5

    Students not scoring A = 30 − 12 = 18; fraction = 18/30 = 3/5.

  7. A pie chart represents 60 people. One sector represents 90°. How many people does that sector represent?

    Answer: 15

    90° is 90/360 = 1/4 of the circle; 1/4 × 60 = 15 people.