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Quartiles, Deciles, and Percentiles

Quiz by MARY ANN B.

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10 questions
Show answers
  • Q1
    Which of the following correctly defines the 30th percentile?
    It is the value below which 70% of the data falls.
    It divides the dataset into 30 equal parts.
    It is the average value of the top 30% of the data.
    It is the value below which 30% of the data falls.
    30s
  • Q2
    What is the second quartile also known as?
    Mode
    Median
    First quartile
    Mean
    30s
  • Q3
    If a score falls at the 70th percentile, which statement is true?
    30% of scores are below this value.
    70% of scores are above this value.
    This score is just above the average.
    70% of scores are below this value.
    30s
  • Q4
    Which of these measures is not affected by extreme values or outliers?
    Standard deviation
    Mean
    Range
    Median
    30s
  • Q5
    What does the first quartile represent in a data set?
    It is the average value of the data set.
    It represents the 50th percentile of the data.
    It is the value below which 25% of the data falls.
    It is the value above which 75% of the data falls.
    30s
  • Q6
    What describes the difference between the third quartile (Q3) and the first quartile (Q1) in a dataset?
    Interquartile Range
    Variance
    Range
    Mean deviation
    30s
  • Q7
    In which part of a dataset does the 5th decile correspond?
    The first quartile
    The third quartile
    The median
    The maximum value
    30s
  • Q8
    What does the 90th percentile of a dataset indicate?
    90% of the data is above this value.
    90% of the data is below this value.
    10% of the data is below this value.
    10% of the data is above this value.
    30s
  • Q9
    Which of these is not a way to divide a dataset into equal parts?
    Deciles
    Percentiles
    Quartiles
    Standard deviation
    30s
  • Q10
    What is the value that divides the top 10% of a dataset from the rest?
    First quartile
    90th percentile
    10th percentile
    Median
    30s

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