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Recap of Last Class
•
Ungrouped and Grouped Frequency Tables
–
Frequency
–
Percentage
–
Relative Frequency
–
Cumulative Frequency
–
Cumulative Percentage
–
Guidelines to Creating Class Intervals
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Real Limits
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Percentile Ranks and Scores
Exercises on Scales of Measurement and
Frequency distributions
#1 For each of the following characteristics, tell whether it is a variable
or a constant. If it is a variable, say whether it is a qualitative
variable, a discrete quantitative variable, or a continuous quantitative
variable.
a) the number of square feet in a square yard
b) the number of square feet in each room of a house, where
N
is the
number of rooms
c) the number of children in a family
d) the occupations of the fathers of the children in a third-grade class
people’s ages
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Exercises on Scales of Measurement and
Frequency distributions
#2 Identify the scale of measurement used in the following examples
(i.e., nominal, ordinal, interval, or ratio).
a) An instructor records the order in which students finish an in-class
assignment; i.e. first, second, third etc.
b) The Stanford-Binet I.Q. test.
c) Weight, measured in kilos.
d) Scores from 1 to 6 from an artistic skating competition.
e) Gender on a census form.
f) List of the five best NHL hockey teams.
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