WorksheetsExperiments
Total questions: 12
Worksheet time: 13mins
What is the main purpose of an experiment?
Actively producing data and conducting comparisons.
To observe changes in nature
Learning about how people live their lives
Discovering new medical techniques and medications.
Experiments that use more than one treatment are generally called:
multi-track experiments
Random comparative experiments
multi-variable experiments
Double-blind experiments
The three principles of experimental design are:
Control, Randomize, Use enough subjects
Hypothesis, Experiment, Results
Control, Bias, Ethics
Design , Treatments, Comparison
Subjects who fail to complete an experiment, or give up halfway through the experiment are called:
non-adheres
Dropouts
Confounders
Outliers
All of the following are elements of a good experimental design except
A control treatment
A random sample
multiple treatments
A single group of people
Who decides if an experiment is ethical or not?
The researchers
The government
an institutional review board
the subjects participating in the experiment
What does subject confidentiality NOT protect.
Subject Name
Subject personal information
Subject data
Experiment Results
What is the difference between an observational study and an experiment?
Observational studies compare data.
Experiments involve active data production.
Experiments involve having multiple treatments
Observational studies have subjects and treatments.
Why do we want our experiments to have random elements in them?
To reduce variability
To increase variability
To reduce bias
To increase bias
An experiment in which neither the researcher nor the subject what treatment is being administered.
Double Blind Experiment
Truly Random Experiment
Unknown Experiment
One-Track Experiment
The results of an experiment are statistically significant when:
The conclusion has good data.
The treatments were conducted successfully.
The results of the experiment could not have occurred through random chance.
The results of the experiment agree with the hypothesis, and the treatments were successful.
In order to determine the effects of repeated concussions on life expectancy a team of researchers reviewed 15 years of NFL players’ concussion records. By reviewing the data, the researchers determined that linebackers were 65% more likely to receive concussions when compared to kickers. They also determined that, on average, kickers lived 12 years longer than linebackers. What is the explanatory variable?
Life expectancy
Repeated concussions
Linebackers
Kickers
