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NBT Statistics and Probability Flashcards

6 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 6 NBT Statistics and Probability flashcards as text

  1. What is the range of the data set: 5, 8, 12, 3, 15, 7?

    Answer: 12

    Range = maximum - minimum = 15 - 3 = 12. The range gives a simple measure of how spread out the data is.

  2. A bag contains 5 red balls and 3 blue balls. If one ball is drawn at random, what is the probability it is blue?

    Answer: 3/8

    Total balls = 5 + 3 = 8. P(blue) = number of blue balls ÷ total = 3/8. Each ball has an equal chance of being drawn.

  3. The standard deviation measures:

    Answer: The spread of data around the mean

    Standard deviation measures how spread out data values are around the mean. A small standard deviation means data points cluster near the mean; a large one means they are more spread out.

  4. If a coin is tossed 3 times, what is the probability of getting exactly 2 heads?

    Answer: 3/8

    The possible outcomes with exactly 2 heads are: HHT, HTH, THH — that's 3 outcomes out of 2³ = 8 total. P = 3/8.

  5. What is the interquartile range (IQR) if Q1 = 15 and Q3 = 35?

    Answer: 20

    IQR = Q3 - Q1 = 35 - 15 = 20. The IQR measures the spread of the middle 50% of the data and is resistant to outliers.

  6. Two events are mutually exclusive if:

    Answer: They cannot occur at the same time

    Mutually exclusive events cannot occur simultaneously. If one happens, the other cannot. For example, getting heads and tails on a single coin flip are mutually exclusive.