Statistics Fundamentals Unit 1 Milestone
You passed this Milestone
28 questions were answered correctly.
1 question was answered incorrectly.
1
Researchers want to test the effects of a new weight loss program. They
...
Statistics Fundamentals Unit 1 Milestone
You passed this Milestone
28 questions were answered correctly.
1 question was answered incorrectly.
1
Researchers want to test the effects of a new weight loss program. They
believe that gender is a significant factor. The participants are divided by
gender. Then, within each group, participants are randomly assigned to
either the treatment or control group.
Which of the following would be the most effective to test the
effects of the new weight loss program?
A matched-pair design experiment
A completely randomized design experiment
A randomized block design experiment
A longitudinal observational study
RATIONALE
Since people are first put into gender and then are assigned treatment or control
randomly this is called a randomized block design.
CONCEPT
Randomized Block Design
2
It’s Saturday afternoon, and Denise is going shopping. She stops by a
department store because she needs a new pair of shoes. She has picked out
three styles that she likes. The store associate asks, “What is your shoe
size?”
Which type of question has the store associate asked?
Closed and binomial question
Closed question
Open question
Open and binomial question
RATIONALE
Recall a closed question has only a limited number of responses. Since she can only
answer with her shoe size, this would be a closed question.
CONCEPT
Question Types
3
In a study to assess the risk of obesity with the amount of time exercised per
week, researchers matched each patient, in a sample of 500 people who are
obese, with a person of the same ethnicity, gender, and age (along with
other similar characteristics) who is not obese. The researchers asked the
patients and their matches a series of questions, and then tracked eating
and exercise habits regularly for several years.
Which type of statistical study are the researchers conducting?
Retrospective study
Designed experiment
Case-control study
Prospective study
RATIONALE
Since the study collected information on people over several years moving forward, it is
a prospective study design.
CONCEPT
Prospective and Retrospective Studies
4
A factory manufactures motorcycles. One of its employees, working in the
quality control department, checks the first 10 and the last 10 motorcycles
manufactured in a day.
This is what type of sampling?
Stratified sampling
Convenience sampling
Voluntary response sampling
Systematic sampling
RATIONALE
Recall that convenience samples are samples taken due to their ease of gathering
information. Since they simple used the first and last 10, this is an example of that.
Convenience samples are generally biased as they probably don't represent the entire
set of interest.
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