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Lesson 1: Analyzing Data Displays — Practice Questions

  1. 1. In a data set of quiz scores, most scores are grouped between 85 and 95. Which of the following scores would most likely be considered an outlier?

    • A. 88
    • B. 92
    • C. 55
    • D. 86
  2. 2. The number of books read by students in a month are: 3, 4, 4, 5, 3, 15, 4. The value that stands out as an outlier in this data set is ___.

  3. 3. A dot plot shows the heights of several plants. Most of the data points are grouped closely together. What is this grouping of similar values called?

    • A. An outlier
    • B. A cluster
    • C. The range
    • D. The mean
  4. 4. The ages of employees at a tech startup are: 25, 28, 26, 30, 27, 49, 29. The age that is an outlier in this group is ___.

  5. 5. In a box plot of daily sales at a cafe, most values are within the box and whiskers. A single point is plotted far to the right of the whisker. This point represents:

    • A. A typical day's sales
    • B. The median sales amount
    • C. An outlier
    • D. A data collection error
  6. 6. A group of friends recorded the number of fish they each caught: 4, 5, 2, 4, 6, 4, 5, 7. On a dot plot of this data, the peak would be at the number ___.

  7. 7. A gardener measures the heights of several new sprouts in centimeters: 5, 6, 6, 7, 10, 11. A dot plot of this data would show a cluster of data points in which range?

    • A. From 5 to 7
    • B. From 6 to 10
    • C. From 7 to 11
    • D. From 10 to 11
  8. 8. The data set {2, 3, 4, 4, 5, 11} represents the number of books read by six students in a month. The value 11 is far from the other data points and is considered an ___.

  9. 9. A class recorded the number of pets at home for each student: 0, 1, 1, 2, 1, 3, 4, 1, 2. The most frequent number of pets, which is the peak of the dot plot, is ___.

  10. 10. A dot plot is created for the following scores on a quiz: 85, 90, 90, 95, 90, 100. The peak of this dot plot is at the score ___.