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Experimental Design Statistics

Authored by Anthony Clark

Mathematics

12th Grade

Used 3+ times

Experimental Design Statistics
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20 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Can pleasant aromas help a student learn better? Two researchers believed that the presence of a floral scent could improve a person's learning ability in certain situations. They had 22 people work through a pencil-and-paper maze 6 times. Three of the times they wore a floral-scented mask and three times they wore an unscented mask. The three trials for each mask followed one another. Testers measures the length of time it took subjects to complete each of the six trials. They reported that, on average, subjects wearing the floral-scented mask completed the maze more quickly that those wearing the unscented mask, although, the difference was not statistically significant. This study is:

convenience sample

an oberservational study

an experiment, but not double-blind

a double-blind experiment

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A market research company wishes to find out whether the population of students at a university prefers Starbucks or Dunkin Donuts. A random sample of students is selected, and each student is asked first to try both but the order they try them is randomly decided with a coin toss (heads: Starbucks, then Dunkin. tails: vice versa). They then indicate which brand they prefer. This is an example of

completely randomized experiment

observational study

stratified sample

matched pairs experiment

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

They are attempts to establish a cause-and-effect relationship between two variables by manipulating one variable.

Observations

Experiments

Correlations

Self-reports

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In order to perform an experiment using 60 members of a gym, I first divide the list of members into men and women because I feel that the results will be different based on gender. I then randomly choose 30 men and 30 women. I assign half of the men to the treatment group and half to the control group. I repeat this procedure with the women. This is an example of a:

randomized comparative design

blocking design

matched pairs design

double blind simple random sample

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What type of study is described? A gym tries out a new weightlifting method to see if it will build muscle for their customers faster than their current method.

Sample Survey

Experiment

Observational Study

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following is a key distinction between well designed experiments and observational studies?

More subjects are available for experiments than for observational studies.

Ethical constraints prevent large-scale observational studies.

Experiments are less costly to conduct than observational studies.

An experiment can show a direct cause-and-effect relationship, whereas an observational study cannot.

Tests of significance cannot be used on data collected from an observational study.

7.

MULTIPLE CHOICE QUESTION

1 min • 10 pts

Does listening to classical music while studying increase test scores?

Survey

Observational study

Experimental study

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