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Mathematics: Probability and Statistics Flashcards

6 cards from real GAOKAO 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 student scores 75, 82, 90, 68, and 85 on five tests. What is the range of scores?

    Answer: 22

    Range = maximum − minimum = 90 − 68 = 22.

  2. In a stem-and-leaf plot, which part represents the last digit of each data value?

    Answer: Leaf

    In a stem-and-leaf plot, leaves represent the trailing digits while stems represent the leading digits.

  3. A survey of 200 students found 120 prefer math over English. What is the relative frequency of students who prefer math?

    Answer: 0.6

    Relative frequency = 120/200 = 0.6.

  4. Which graph is most appropriate for displaying the distribution of a continuous variable such as exam scores?

    Answer: Histogram

    Histograms group continuous data into intervals (bins) and display frequency distributions effectively.

  5. If the standard deviation of a dataset is 0, what does this imply about the data?

    Answer: All values are identical

    A standard deviation of 0 means every data point equals the mean, so all values are identical.

  6. A conditional probability P(A|B) represents the probability of event A given that:

    Answer: B has already occurred

    Conditional probability P(A|B) is the probability of A occurring given that event B is known to have occurred.