Are you ready to take Milestone 1?
Taking this practice test is a stress-free way to find out if you are ready for Milestone 1 assessment. You can
print it and test yourself to discover your strengths and weaknesses. T
...
Are you ready to take Milestone 1?
Taking this practice test is a stress-free way to find out if you are ready for Milestone 1 assessment. You can
print it and test yourself to discover your strengths and weaknesses. The answer key is at the end of this
practice milestone.
QUESTION 1
One typical way to select a sample is to randomly pick phone numbers from a telephone book. This method
can introduce __________, because those that cannot afford a telephone, chose not to have a telephone,
or do not list their phone numbers will not be represented.
Solution guide Tutorials that teach this concept
The sample is collected in a way that leaves out those that do
not have a phone or those who choose to not publish their
phone numbers in the phone book. Therefore, the sample is
not representative of the population.
data, bias, Sampling
QUESTION 2
A __________ variable is an unforeseen variable that is related to the explanatory variable and has a
significant effect on the response variable.
Solution guide Tutorials that teach this concept
Remember that the explanatory variable is the independent
variable that has an effect on the response variable
(dependent variable). When we can’t tell if it is in fact the
explanatory variable affecting the response variable, or if it is
another variable that was taken into account, what do we call
that?
variables, confounding
variables
SOPHIA PATHWAYS FOR COLLEGE CREDIT – STATISTICS
PRACTICE MILESTONE 1
© 2012 Sophia Learning, LLC.
QUESTION 3
Data that was gathered for a past study and re-used to answer questions in a present study is called
__________ data.
Solution guide Tutorials that teach this concept
There are two ways to collect data. New data can be
collected, or data that has already been collected can be
used. What is the name for each type of data?
data
QUESTION 4
Sample surveys are one form of a(n) __________ statistical study?
Solution guide Tutorials that teach this concept
Sample surveys can be used to make observations/inferences
about populations, whereas an experiment manipulates one
variable to measure another.
surveys, observational
studies, experiments
QUESTION 5
A nationwide study of hospital service in maternity wards randomly selected 45 hospitals. Every birth
mother who had a child during the first week of June at any of these 45 hospitals completed a survey on
service received in the maternity ward. This is an example of __________ sampling.
Solution guide Tutorials that teach this concept
Think about how the sample was collected. First, the hospitals
were randomly selected. Secondly, every mother that
delivered in the maternity ward only during the first week of
June was surveyed. What type of sampling divides the
population more than once, and then samples every subject
within the final group that has been randomly selected?
simple random samples,
systematic random samples,
stratified random samples,
cluster samples, multi-stage
sample
SOPHIA PATHWAYS FOR COLLEGE CREDIT – STATISTICS
PRACTICE MILESTONE 1
© 2012 Sophia Learning, LLC.
QUESTION 6
A sample composed of people who are readily available, easily recruited, or volunteer is called a
__________ sample.
Solution guide Tutorials that teach this concept
This type of sampling method typically will not repre
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