Automobile Speeding Statistics
2009
Statistics. Please Check.?
(F14)
Identify each of the random variables as continuous or discrete.
a) Speed of an automobile
Continuous
b) The number of doughnuts left in the pantry
Discrete
c) The air temperature of a public park
Continuous
d) The weight of a professional wrestler
Continuous
e) The number of restaurant patrons
Discrete
F(1)
For the information (a) to (e) list the highest level of measurement as ratio, interval, ordinal, or nominal.
A book inventory record contains the following information:
a) Title: More Mysteries
Ordinal
b) Author: Roger Mortimer
Nominal
c) Date of publication: 1998
Interval
d) List price: $25.00
Ratio
e) Number in stock: 6
Ordinal
F14)
think of continuous random variables as anything that can take on any value on a defined interval of the real number line.
think of discrete values as anything that has values that are only points on the number line.
a) continuous
b) discrete
c) continuous
d) continuous
e) discrete
F1)
ordinal – values are only important for a measure of sequence, 1st place, 2nd place…
on a scale of 1 to 10 rate your joy with ….
a Likert Scale, i.e., strongly disagree, disagree, neutral, agree, strongly agree
Nominal – also called categorical, order does not matter. things such, e.g., color, gender.
interval – anything that measure the difference between to measurements. for example the difference between 100 feet and 90 feet is the same as the difference between 70 and 60 feet. Temperature is a good example
ratio – same as interval but with a defined value of 0.
a) I’d say the title is a categorical variable, it’s ordinal if used to order the books by title
b) categorical
c) interval
d) ratio
e) ordinal
Hal Varian on “Computer Mediated Transactions” (AEA 2010)
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