2106 Univariate Data - Creating Intervals

12 Questions | Total Attempts: 670

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2106 Univariate Data - Creating Intervals

How do you create an interval? How do you know how wide it should be, and how many intervals to create?


Questions and Answers
  • 1. 
    What is the ideal number of intervals for a set of data?
    • A. 

      Less than 5

    • B. 

      More than 20

    • C. 

      12

    • D. 

      Between 5 and 15

    • E. 

      Less than 7

    • F. 

      I don't know

  • 2. 
    The number of intervals we choose for a data set is 'arbitrary'. What does this mean?
    • A. 

      Exact

    • B. 

      Small

    • C. 

      Randomly chosen

    • D. 

      Chosen by a formula

    • E. 

      Designed to confuse

    • F. 

      I don't know

  • 3. 
    The interval width we choose is designed to :
    • A. 

      Show all the data

    • B. 

      Show a pattern in the data

    • C. 

      Display the data laterally

    • D. 

      Show the range more easily

    • E. 

      Spread the data out

    • F. 

      I don't know

  • 4. 
    I have data from 200 people regarding their resting heart rates - from 47 beats per minute to 108 beats per minute. If I decide to make the intervals 10 wide, how many intervals would I have?
  • 5. 
    I have data from 200 people regarding their resting heart rates - from 67 beats per minute to 108 beats per minute. If I decide to make the intervals 10 wide, how many intervals would I have?
  • 6. 
    What is the width of the interval class shown in the histogram above
  • 7. 
    The histogram below displays a set of data in interval classes. The first class goes from 76-77.9, the second from 78-79.9 etc.What is the modal class interval?
  • 8. 
    What is the width of the interval class shown in the histogram above?
  • 9. 
    What is the frequency of the modal interval?
  • 10. 
    How many interval classes are in the histogram above?
  • 11. 
    What is the frequency of the modal interval in the histogram above?
  • 12. 
    The histogram below shows data displayed in interval classes from 65-69.9, 70-74.9 etc.What is the frequency of the 95-99.9 interval class?
  • 13. 
    What is the frequency of the modal interval in the histogram above?
  • 14. 
    The histogram below displays data in class intervals from 165-169.9, 170-174.9 etc.What is the modal interval in the histogram above?
  • 15. 
    The histogram below displays data in class intervals from 165-169.9, 170-174.9 etc.What is the frequency of the interval 195-199.9 in the histogram above?
  • 16.