WorksheetsAP STATS Warm Up #9
Total questions: 5
Worksheet time: 1hrs 15mins
A candy manufacturer wants to test consistency of the sugar content of chocolate-covered cherries produced in one factory. The company decided to randomly select three boxes of chocolate-covered cherries from each day’s production run at the factory and analyze every cherry in each of these boxes as to sugar content. What type of sampling is this?
a SRS
Cluster
Stratified
Systematic
convenience
A TV station broadcast a court trial in its entirety. During a news program, viewers were asked to go to the TV station’s web site and state whether they thought the defendant was guilty or not guilty. Of the 1840 viewers who gave their opinion, 1,521 felt the defendant was not guilty. What type of sampling is this?
A SRS
convenience sample
stratified random sample
voluntary response sample
A bank wishes to survey its customers. The decision is made to randomly pick ten customers who just have a checking account, ten customers who just have a savings account, and ten customers who have both. This procedure is an example of what type of sampling?
Cluster
Convenience
Systematic
SRS
Stratified
A local television station is interested in how citizens in a small town feel
about the increased sales tax proposed by the city council. The question “Are you in favor of the proposed sales tax increase that will be used to improve the sidewalks and streets in downtown?” was shown on the screen during the evening news broadcast and viewers were instructed to text their answer to the number given on the screen. This survey method could produce biased results for all of the following reasons except
the wording of the question is biased.
a person could answer the survey multiple times.
it uses a stratified sample rather than a simple random sample.
the survey excludes voters who do not watch the evening news cast (undercoverage)
people who feel strongly about the issue are more likely to respond (response bias)
The director of an alumni association wants to estimate the mean income of
the members of the class of 1999. Each person in the class of 779 graduates was given the survey and 163 of the graduates returned the survey. How could the nonresponse by the 616 graduates who did not return the survey cause the results of the survey to be biased?
The graduates who did not respond may represent a group that is
homogeneous with respect to income and differs from the graduates who did respond.
The graduates who did not respond changed the survey from a census to a
simple random sample of graduates.
The graduates who did not respond reduced the sample size and smaller
samples are more biased than large samples.
The graduates who did not respond may represent a group that is heterogeneous with
respect to income and is similar to the graduates who did respond.
