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Analysis of Tables and Charts Flashcards

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

Read the first 7 Analysis of Tables and Charts flashcards as text

  1. A table shows population data: Town A increased from 12,000 to 15,000 over 5 years, while Town B increased from 8,000 to 11,200. Which town had the greater percentage increase?

    Answer: Town B, with 40%

    Town A: (3,000/12,000)×100 = 25%; Town B: (3,200/8,000)×100 = 40%, so Town B had the greater percentage increase.

  2. A line graph has two lines: Line P rises consistently, Line Q falls consistently. They intersect once. What does the intersection point represent?

    Answer: The point where both variables have equal values

    An intersection point on a graph represents where the two lines have the same value at the same x-coordinate.

  3. A stacked bar chart shows total revenue of $100K split between Product X and Product Y across three years. In Year 1, X=$60K and Y=$40K; in Year 3, X=$40K and Y=$60K. What changed?

    Answer: Product Y became the dominant revenue source

    Product Y's share grew from 40% to 60% of equal total revenue, making it the dominant source in Year 3.

  4. A histogram has bars of heights 3, 7, 12, 9, 4 for intervals 0-9, 10-19, 20-29, 30-39, 40-49. The distribution is best described as:

    Answer: Approximately bell-shaped with a peak in the middle

    The frequencies rise to a peak in the middle interval (20-29) and fall on both sides, forming an approximately bell-shaped (unimodal) distribution.

  5. A table lists monthly expenses: Rent $1,200, Food $400, Transport $150, Entertainment $250, Savings $500. What fraction of total expenses is spent on food and entertainment combined?

    Answer: 1/4

    Total = $2,500; Food + Entertainment = $650; 650/2,500 = 13/50, which simplifies to approximately 1/4 (0.26).

  6. In a chart, the y-axis scale starts at 500 instead of 0. A bar appears twice as tall as another. What caution should a reader exercise?

    Answer: The visual difference is exaggerated; the actual ratio may be much smaller than 2:1

    A truncated y-axis makes small differences appear larger visually, so the 2:1 visual ratio does not mean one value is actually double the other.

  7. A two-way table shows 200 survey responses. 120 respondents prefer coffee, of whom 80 are female. 80 prefer tea, of whom 30 are female. What percentage of all females prefer coffee?

    Answer: 72.7%

    Total females = 80 + 30 = 110; females who prefer coffee = 80; 80/110 ≈ 72.7%.