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Data Interpretation & Analysis Flashcards

7 cards from real NBT 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 & Analysis flashcards as text

  1. The ages of 7 employees are: 25, 32, 28, 45, 32, 38, 41. What is the median age?

    Answer: 32

    Sorted order: 25, 28, 32, 32, 38, 41, 45 — the 4th (middle) value is 32.

  2. A class of 10 students has scores: 70, 75, 80, 80, 85, 90, 90, 90, 95, 100. What is the mode of these scores?

    Answer: 90

    90 appears 3 times, more than any other value, so it is the mode.

  3. A sample of 6 values has a mean of 15. Five of the values are 12, 18, 10, 20, and 16. What is the sixth value?

    Answer: 14

    Required sum = 15 × 6 = 90; sum of five known values = 76; sixth value = 90 − 76 = 14.

  4. A bag contains 5 red marbles, 3 blue marbles, and 2 green marbles. If one marble is drawn at random, what is the probability of drawing a blue marble?

    Answer: 0.30

    P(blue) = 3 / (5 + 3 + 2) = 3 / 10 = 0.30.

  5. A data set contains the values: 12, 15, 18, 22, 22, 25, 30. What is the interquartile range (IQR)?

    Answer: 10

    Q1 = 15 and Q3 = 25; IQR = Q3 − Q1 = 25 − 15 = 10.

  6. A histogram shows 30% of data falls below 50, 45% falls between 50 and 75, and 25% falls above 75. If 400 data points are represented, how many fall between 50 and 75?

    Answer: 180

    45% × 400 = 180 data points fall in the 50–75 interval.

  7. Events A and B are independent with P(A) = 0.4 and P(B) = 0.5. What is the probability that both events occur?

    Answer: 0.20

    For independent events, P(A and B) = P(A) × P(B) = 0.4 × 0.5 = 0.20.