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Z scores

Quiz by Deanna Triplett

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9 questions
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  • Q1
    What is a z score?
    The average of all the data points in a sample or population.
    The maximum value in a set of data points.
    A standardized score that indicates how many standard deviations an observation or data point is from the mean.
    The minimum value in a set of data points.
    30s
  • Q2
    In a normal distribution, what is the z score of the mean?
    3
    0
    1
    2
    30s
  • Q3
    What is the formula for calculating a z score?
    z = (μ - x) / σ
    z = (x - σ) / μ
    z = (x - μ) / σ
    z = (σ - x) / μ
    30s
  • Q4
    What does a positive z score indicate?
    The data point is equal to the mean.
    The data point is above the mean.
    The data point is below the mean.
    The data point is an outlier.
    30s
  • Q5
    What does a negative z score indicate?
    The data point is below the mean.
    The data point is an outlier.
    The data point is above the mean.
    The data point is equal to the mean.
    30s
  • Q6
    What is the z score of a data point that is equal to the mean?
    2
    0
    3
    1
    30s
  • Q7
    What is the z score of a data point that is one standard deviation above the mean?
    -1
    1
    0
    2
    30s
  • Q8
    What is the z score of a data point that is two standard deviations below the mean?
    0
    2
    -2
    -1
    30s
  • Q9
    What is the z score of a data point that is three standard deviations above the mean?
    3
    1
    0
    2
    30s

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