MATH 225N Week 1 Comprehensive Questions and
Answers.
Week 1 Evidence, Claims, and types Questions and Answers
1. A study is planned to research the effects of drinking coffee on hours ofsleep.
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 ornot a
person drinks coffee.
An observational study should be used because it is not possible to control the numberof hours
of sleep a person has.
An experimental study should be used where the consumption of coffee is theexperimental factor.
An experimental study should be used where the number of hours of sleep is theexperimental
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 ofREM
sleep by more than 10%.
Watching 1 hour of video just before going to bed reduces the quality of sleep.
, MATH 225N Week One Comprehensive Q & A. All Correct
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 theirfeedback 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.
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 theirfeedback 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:
Answers.
Week 1 Evidence, Claims, and types Questions and Answers
1. A study is planned to research the effects of drinking coffee on hours ofsleep.
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 ornot a
person drinks coffee.
An observational study should be used because it is not possible to control the numberof hours
of sleep a person has.
An experimental study should be used where the consumption of coffee is theexperimental factor.
An experimental study should be used where the number of hours of sleep is theexperimental
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 ofREM
sleep by more than 10%.
Watching 1 hour of video just before going to bed reduces the quality of sleep.
, MATH 225N Week One Comprehensive Q & A. All Correct
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 theirfeedback 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.
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 theirfeedback 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:
