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Math Statistics and Data Analysis Flashcards

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

Read the first 6 Math Statistics and Data Analysis flashcards as text

  1. A survey shows 40% of 200 people prefer coffee. How many people prefer coffee?

    Answer: 80

    40% of 200 = 0.40 × 200 = 80 people.

  2. What is the probability of rolling a number greater than 4 on a standard six-sided die?

    Answer: 1/3

    Numbers greater than 4 are 5 and 6 — P = 2/6 = 1/3.

  3. The data set is: 5, 5, 5, 10, 15. Which measure of central tendency gives 5?

    Answer: Mode

    5 appears three times (most frequent), so 5 is the mode.

  4. A frequency table shows scores: 70 (×3), 80 (×4), 90 (×3). What is the mean score?

    Answer: 80

    Mean = (70×3 + 80×4 + 90×3) ÷ 10 = (210 + 320 + 270) ÷ 10 = 800 ÷ 10 = 80.

  5. If two events A and B are independent and P(A) = 0.3 and P(B) = 0.4, what is P(A and B)?

    Answer: 0.12

    For independent events, P(A and B) = P(A) × P(B) = 0.3 × 0.4 = 0.12.

  6. A stem-and-leaf plot has stems 1, 2, 3 with leaves 5|6|8, 1|3|7|9, 2|4|6. What is the largest value?

    Answer: 36

    The stem 3 with largest leaf 6 gives the value 36, which is the highest value in the plot.

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