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Data Analysis Flashcards

7 cards from real CHSPE 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 scatter plot shows points clustered tightly around a line that goes from the lower-left to the upper-right. What does this indicate?

    Answer: Strong positive correlation

    Points clustered tightly along an upward-sloping line indicate a strong positive correlation between the two variables.

  2. A data set has values: 4, 7, 7, 9, 13. What is the median?

    Answer: 7

    When five values are arranged in order, the median is the middle (third) value, which is 7.

  3. A survey of 200 students found 50 prefer math. What percentage prefer math?

    Answer: 25%

    50 out of 200 = 50/200 = 0.25 = 25%.

  4. Which graph is BEST for showing how a city's population changed over 10 years?

    Answer: Line graph

    A line graph is best for showing change over time because it emphasizes trends and continuity.

  5. A box plot's interquartile range (IQR) is the distance between which two values?

    Answer: Q1 and Q3

    The IQR is Q3 minus Q1, representing the spread of the middle 50% of the data.

  6. The following scores were recorded: 55, 60, 62, 65, 90. Which measure is most affected by the score of 90?

    Answer: Mean

    The mean is pulled toward extreme values (outliers), making it the measure most affected by the score of 90.

  7. A two-way table shows 30 boys and 20 girls surveyed. 18 boys and 10 girls chose basketball. What fraction of all students chose basketball?

    Answer: 28/50

    18 + 10 = 28 students chose basketball out of 50 total, giving 28/50.