Graphical descriptive techniques II - Graphical techniques to describe a set of interval data

10 important questions on Graphical descriptive techniques II - Graphical techniques to describe a set of interval data

How do you call a graphical presentation of a frequency distribution?

Histogram

How do you call non-overlapping intervals of data?

Classes

How do you call a histogram one in which, if a line were drawn down the middle, the two halves would be mirror images?

Symmetric histogram
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How do you call a class with the largest number of observations?

Modal class

How do you call a histogram that has one mode?

Unimodal histogram

How do you call a histogram that has two modes?

Bimodal histogram

How do you call a display of data in which the stem consists of the digits to the left of a given point and the leaf the digits to the right?

Stem-and-leaf

How do you call a percentage of observations less than the upper limit of a class?

Cumulative relative frequency

How do you call a graphical representation of the cumulative relative frequencies?

Ogive

What are the two factors that identify when to use a histogram, Ogive, or stem-and-leaf display?

  1. Objective: Describe a single set of data
  2. Data type: Interval

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