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definition: measurement in which numbers are assigned to objects or classes of objects solely for the purpose of identification
nominal scale
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definition: measurement in which numbers are assigned to data on the basis of some order of the object. For example, more than, greater than...
ordinal scale
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definition: measurement in which the assigned numbers legitimately allow the comparison of the size of the differences among and between numbers
interval scale
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definition: measurement that has a natural, absolute, zero and therefore allows the comparison of absolute magnitudes of the numbers
ratio scale
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typical measures of nominal
- male/female
- users/nonusers
- occupations
- uniform numbers
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typical measures of ordinal
- brand preference
- social classes
- hardness of material
- graded quality of lumber
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typical measures of interval
- temperature scale
- gpa
- attitudes toward brand
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typical measures of ratio
- units sold
- number of purchases
- income
- age
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average/ measure of central tendency of nominal scale
mode
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average/ measure of central tendency of ordinal scale
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average/ measure of central tendency of interval scale
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average/ measure of central tendency of ratio scale
- *mean --> geometric & harmonic mean
- median
- mode
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which of the soft drinks on the following list do you like? check all that apply
nominal scale
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please rank the soft drinks on the following list according to your degree of liking for each, assigning your most preferred drink =1 and lease =6
ordinal
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please indicate your degree of liking each of the soft drinks on the following list by checking the appropriate position on the scale (dislike a lot, dislike, like, like a lot)
interval scale
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please divide 100 points among each of the following soft drinks according to your degree of liking for each
ratio scale
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where did you buy toothpaste last time?
a. supermarket
b. discount store
c. somewhere else
nominal
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what is your social security number?
nominal
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how many movies did you see last month?
a. none
b. one or two
c. three or more
ordinal scale
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how likely are you to buy a colbolt?
a. very likely
b. likely
c. neither likely or unlikely
etc
interval scale
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how old are you?
how many people in your class?
how many miles to school?
ratio scale
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are you older than 30?
___yes
___no
nominal
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how old are you?
___ <30
___ 30-40
___ >40
ordinal
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how old are you?
___ 21-30
___ 31-40
___ 41-50
___ 61-60
interval
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