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Data Interpretation & Statistics Flashcards

7 cards from real PERT 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 Interpretation & Statistics flashcards as text

  1. The mean of 5 numbers is 12. What is their sum?

    Answer: 60

    Sum equals mean times count, so 12 × 5 = 60.

  2. If a value is added that equals the current mean, the mean will do what?

    Answer: Stay the same

    Adding a value equal to the mean does not change the average.

  3. In a frequency table, a class has frequency 8 out of 40 total. What is its relative frequency?

    Answer: 0.20

    8 divided by 40 equals 0.20.

  4. Which graph type best shows parts of a single whole?

    Answer: Pie chart

    A pie chart divides one whole into proportional slices.

  5. The mean of 4, 6, 8, and x is 7. What is x?

    Answer: 10

    The four values must sum to 28, so x = 28 − 18 = 10.

  6. A scatter plot showing points trending downward suggests what correlation?

    Answer: Negative

    Points falling as x increases indicate a negative correlation.

  7. What is the median of 3, 9, 1, 7, 5, 11?

    Answer: 6

    Ordered, the middle two values 5 and 7 average to 6.