Sample of Convenience
A sample that is not drawn by a well-defined random method. - Ex: A researcher asks
everyone in a particular barbershop their opinions on world politics.
Is this number a parameter or a statistic
...
Sample of Convenience
A sample that is not drawn by a well-defined random method. - Ex: A researcher asks
everyone in a particular barbershop their opinions on world politics.
Is this number a parameter or a statistic?
54% of employees at a certain company are male.
Parameter
Statistics Examples
In a new survey of new automobile owners, 43% plan to buy another new vehicle within
four years. In a survey of voters, 77% plan to vote for the incumbent
A student artist number hers pieces and selects every 4th one for a gallery showing
Systematic Sample
Simple Random Sample
A simple random sample of size n is a sample chosen by a method in which each
collection of n population items is equally likely to make up the sample, just as in a
lottery. - Ex: a reality show assigns all qualified applicants a number and uses a random
number generator to select the participant list.
A manager at a family amusement park post a Facebook ad asking for feedback on the
new rides
Voluntary Response
A news reporter at a family amusement park conducts a __________ sample by
randomly selecting a ride and then interviewing all the people who just exited the ride.
cluster
Stratified
The student government association at a certain college draws a random sample of 20
freshman, a random sample of 20 sophomores, and a random sample of 30 juniors and
a random sample of 30 seniors to ask their opinion about a new grading policy.
Determine whether the data described are qualitative or quantitative.
The maximum speed limit on interstate highways.
Quantitative
Determine whether the data describe
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