Statistics Class Intervals and Histograms
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Questions and Answers

What is the purpose of a histogram?

  • To display gaps between bars
  • To summarize continuous data (correct)
  • To summarize discrete data
  • To use qualitative data

    • How is a histogram different from a vertical bar graph?

  • It displays gaps between bars
  • It uses only qualitative data
  • It shows no gaps between the bars (correct)
  • It is not used for summarizing data

    • What does the relative frequency in a frequency distribution table represent?

  • The total frequency of all classes
  • The cumulative frequency
  • The number of class boundaries
  • The percentage of each class relative to the total (correct)

    • In the context of frequency distribution, what do class boundaries represent?

    <p>The range of values within a class</p> Signup and view all the answers

    What is the formula for calculating cumulative frequency in a frequency distribution table?

    <p>$N = \sum f$</p> Signup and view all the answers

    What is a statistical question?

    <p>A question that anticipates many different responses</p> Signup and view all the answers

    What is meant by variability in a set of data?

    <p>The spread or dispersion of data values in the set</p> Signup and view all the answers

    Which method of presenting data is considered the simplest?

    <p>Textual Method</p> Signup and view all the answers

    What does a frequency distribution table help in showing?

    <p>The distribution of data values into classes or categories</p> Signup and view all the answers

    In a frequency distribution table, what are class limits?

    <p>The upper and lower boundaries of each class interval</p> Signup and view all the answers

    What do class boundaries represent in a frequency distribution table?

    <p>They separate adjacent classes without gaps or overlaps</p> Signup and view all the answers

    What is the class mark of a class with lower limit 10 and upper limit 20?

    <p>15</p> Signup and view all the answers

    In a Frequency Distribution Table (FDT), what does the term 'class width or size' refer to?

    <p>The distance between the lower limit of one class and the lower limit of the next class</p> Signup and view all the answers

    What does relative frequency represent in a Frequency Distribution Table (FDT)?

    <p>The ratio of the class frequency to the total number of observations</p> Signup and view all the answers

    Which term refers to the numbers midway between the upper limit of one class and the lower limit of the next class?

    <p>Class boundaries</p> Signup and view all the answers

    What does 'Less than cumulative frequency' represent in a Frequency Distribution Table?

    <p>Number of observations less than or equal to the upper limit of the class interval</p> Signup and view all the answers

    In a Frequency Distribution Table, what does 'Greater than cumulative frequency' represent?

    <p>Number of observations greater than or equal to the upper limit of the class interval</p> Signup and view all the answers

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