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Data Visualization and Interpretation Flashcards

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

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  1. A back-to-back stemplot compares the test scores of two classes. Class A has a median of 82 and Class B has a median of 75. Which conclusion is best supported?

    Answer: Typical scores in Class A are higher than in Class B.

    The median represents the typical (middle) value, so Class A's higher median indicates its typical scores are higher.

  2. A cumulative relative frequency plot (ogive) shows that the 60th percentile corresponds to a value of 45. What does this mean?

    Answer: 60% of the data values are at or below 45.

    The 60th percentile means 60% of data values fall at or below that value (45).

  3. Which graphical display is MOST useful for identifying whether a quantitative variable follows a roughly normal distribution?

    Answer: Histogram or dotplot

    Histograms and dotplots show the shape of a distribution, making it easy to assess symmetry and bell shape.

  4. A time series plot of monthly sales shows an overall upward trend with a repeating seasonal dip every December. This pattern is best described as:

    Answer: A trend with seasonal variation.

    An overall directional movement (trend) combined with a repeating pattern within each year is called trend with seasonal variation.

  5. In a dotplot of 30 values, a single dot appears far to the right, separated from the main cluster. This point is most likely:

    Answer: A potential outlier.

    A point separated from the main cluster of data is characteristic of an outlier.

  6. A boxplot shows Q1 = 20, median = 30, Q3 = 50, with a minimum of 10 and maximum of 70. Which statement about the distribution is correct?

    Answer: The upper half of the data is more spread out than the lower half.

    The upper half spans Q3 to max = 20 units, while the lower half spans min to Q1 = 10 units, indicating more spread in the upper half.

  7. A two-way frequency table shows the relationship between gender (male/female) and preferred social media platform. To compare platform preferences between genders, you should use:

    Answer: Row or column conditional relative frequencies.

    Conditional relative frequencies (row % or column %) allow fair comparison between groups of different sizes.