10Statistics MilestoneAllR.pdf - 6/10/2021 Score 28/29...

6/10/2021 Sophia :: Welcome
UNIT 1 — PRACTICE MILESTONE 1
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28 questions were answered correctly .
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1
Which of these statements is true about a blind experiment?
The total population is divided into homogeneous blocks.
Some people involved are prevented from knowing certain information that might lead to biased results.
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Closely matched elements are paired and then treatments are allotted to them.
The total population is divided roughly into some groups and then some of the groups are randomly selected.
RATIONALE
Blinding helps to prevent members of a study know key information in order to prevent them from behaving or responding in a fashion that would be biased if they
knew if they were in a treatment or control group. For example, if you knew you were in a treatment group, you might be more inclined to say it is working or give
responses that indicate that it is.
CONCEPT
Blinding
2
A survey was conducted to find the number of hours that people spend on their phones in a day. A group of 300 people in a shopping mall were asked about how
long they spend on their phone and It was found that 42 people spend at least two hours on their phone in a day.
Which of these does not represent inferential statistics?