,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.
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 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?
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.
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 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?
