Questions and Answers Week 1 Evidence|Claims|and types latest updates

Questions and Answers Week 1
Evidence|Claims|and types latest
updates
1. A study is planned to research the effects of drinking coffee on hours
of sleep. Would an experimental or observational study design be
more appropriate?


Select the correct answer below:


An observational study should be used because it is not possible to control
whether or not a person drinks coffee.

An observational study should be used because it is not possible to control
the number of hours of sleep a person has.

An experimental study should be used where the consumption of coffee is the
experimental factor.

An experimental study should be used where the number of hours of sleep is
the experimental factor.


2. A researcher is interested in the effects of watching videos just before
bed on the quality of sleep. Which of the following claims would be
appropriate for this situation? Select only one answer choice.


Select the correct answer below:


Watching videos just before bed reduces quality of sleep.

More than 60% of people watch videos just before going to bed.

Watching 1 hour of video just before going to bed reduces the number of
minutes of REM sleep by more than 10%.

Watching 1 hour of video just before going to bed reduces the quality of
sleep.


Questions and Answers Week 1
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, Questions and Answers Week 1
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3. In a psychological study aimed at testing a medicine for reducing stress
levels, the researcher grouped the participants into 2groups and gave the
stress-reduction pill to one group and a placebo pill to another group. In
the description of the above situation, determine the experimental group.


Select the correct answer below:


The group that received the stress-reduction pill is the

experimental group. The group that received the placebo pill is the

experimental group.
Both the groups are experimental

groups. Neither group is an

experimental group.

4. In a survey conducted to find out the feedback of a sports program
organized in a club, the organizers asked the respondents to classify
their feedback as good, fair, poor, and bad. Is the study observational
or experimental? If it is an experiment, what is the controlled factor?


Select the correct answer below:


The study is an observational study.

The study is an experiment. The controlled factor is the

feedback. The study is an experiment. The controlled

Questions and Answers Week 1
Evidence|Claims|and types latest
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, Questions and Answers Week 1
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factor is the ratings.
The study is an experiment. The controlled factor is the respondents.

5. In a survey conducted to find out the feedback of a sports program
organized in a club, the organizers asked the respondents to classify
their feedback as good, fair, poor, and bad. Is the study observational
or experimental? If it is an experiment, what is the controlled factor?



Select the correct answer below




The study is an observational study.

The study is an experiment. The controlled factor is the

feedback. The study is an experiment. The controlled

factor is the ratings.
The study is an experiment. The controlled factor is the respondents.


6. A study was performed with a random sample of 513 bolts produced
at one factory. What population would be appropriate for generalizing
conclusions from the study, assuming the data collection methods
used did not introduce biases?


Select the correct answer below:


The conclusions would apply to all bolts produced by that factory.



Questions and Answers Week 1
Evidence|Claims|and types latest
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