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Data and Statistical Interpretation 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 Data and Statistical Interpretation flashcards as text

  1. A bar chart shows monthly sales: Jan=120, Feb=95, Mar=140, Apr=110. What is the range of these values?

    Answer: 45

    Range = highest minus lowest = 140 − 95 = 45.

  2. A pie chart shows that 25% of students prefer science. If there are 200 students total, how many prefer science?

    Answer: 50

    25% of 200 = 0.25 × 200 = 50 students.

  3. A line graph shows temperatures rising from 10°C to 22°C over 6 days. What is the average daily increase?

    Answer: 2°C

    Total increase = 22 − 10 = 12°C over 6 days, so average = 12 ÷ 6 = 2°C per day.

  4. The following data set shows ages: 14, 16, 18, 20, 22, 24, 26. What is the median age?

    Answer: 20

    With 7 ordered values, the median is the 4th value = 20.

  5. A frequency table shows 5 students scored 60, 8 scored 70, and 7 scored 80. What is the modal score?

    Answer: 70

    The mode is the score that appears most frequently — 70 was scored by 8 students.

  6. A scatter graph shows a strong positive correlation between study hours and test scores. What does this mean?

    Answer: As study hours increase, test scores tend to increase

    A positive correlation means both variables tend to increase together.

  7. A tally chart records favorite colors. Red has 12 tallies, Blue has 18, Green has 9, Yellow has 6. What percentage chose Blue?

    Answer: 40%

    Total = 12+18+9+6 = 45; Blue percentage = 18/45 × 100 = 40%.