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EOC Statistics and Probability Flashcards

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

Read the first 6 EOC Statistics and Probability flashcards as text

  1. What is 'standard deviation' a measure of?

    Answer: How spread out values are from the mean

    Standard deviation measures how much individual data points in a set deviate or differ from the mean, indicating variability or spread.

  2. If two events are independent, how is the probability that both occur calculated?

    Answer: By multiplying their individual probabilities

    For independent events, the probability that both occur equals the product of their individual probabilities: P(A and B) = P(A) × P(B).

  3. A scatter plot shows data points clustered closely along a line going from lower-left to upper-right. What does this indicate?

    Answer: A strong positive correlation

    When data points cluster closely around a line that rises from left to right, it indicates a strong positive correlation between the two variables.

  4. What is the 'mode' of a data set?

    Answer: The most frequently occurring value

    The mode is the value that appears most often in a data set, and a data set can have one mode, multiple modes, or no mode at all.

  5. Which measure of central tendency is most affected by extreme outliers in a data set?

    Answer: Mean

    The mean is most sensitive to outliers because it uses every value in its calculation, so a very large or small value can significantly shift the average.

  6. What does a correlation coefficient of -1 indicate?

    Answer: A perfect negative linear relationship

    A correlation coefficient of -1 indicates a perfect negative linear relationship, meaning as one variable increases, the other decreases exactly proportionally.