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NBT Statistics and Probability 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 NBT Statistics and Probability flashcards as text

  1. A dataset has values 5, 8, 8, 10, 12, 15, 15, 15, 20. What is the mode?

    Answer: 15

    The mode is 15 because it appears three times, more than any other value.

  2. If two events A and B are mutually exclusive, which of the following is true?

    Answer: P(A and B) = 0

    Mutually exclusive events cannot occur simultaneously, so P(A and B) = 0.

  3. A box contains 4 red, 3 blue, and 5 green marbles. What is the probability of NOT picking a blue marble?

    Answer: 9/12

    P(not blue) = (4+5)/12 = 9/12 = 3/4.

  4. The interquartile range (IQR) of a dataset is best described as:

    Answer: The difference between the third and first quartiles

    The IQR = Q3 − Q1, representing the spread of the middle 50% of the data.

  5. A student scores 72, 85, 90, 68, and 75 on five tests. What is the mean score?

    Answer: 78

    Mean = (72+85+90+68+75)/5 = 390/5 = 78.

  6. Which measure of central tendency is most affected by extreme outliers?

    Answer: Mean

    The mean is most sensitive to outliers because it uses all values in its calculation.

  7. A fair coin is flipped three times. What is the probability of getting exactly two heads?

    Answer: 3/8

    There are 3 favorable outcomes (HHT, HTH, THH) out of 8 total, so P = 3/8.