Experimental Design B/C

[kate!]

Questions (Click to Show Hidden Text)

1. How does an outlier in the data occur?
2. Why do we need controlled variables?

[dxu46]

Questions (Click to Show Hidden Text)

1. How does an outlier in the data occur?
2. Why do we need controlled variables?

Answers (Click to Show Hidden Text)

1. An outlier occurs when there is an error in execution, recording, etc.
2. Controlled variables help make sure only one thing is tested and the results only come from one source.

[kate!]

Questions (Click to Show Hidden Text)

1. How does an outlier in the data occur?
2. Why do we need controlled variables?

Answers (Click to Show Hidden Text)

1. An outlier occurs when there is an error in execution, recording, etc.
2. Controlled variables help make sure only one thing is tested and the results only come from one source.

Great job, your turn.

[dxu46]

Questions (Click to Show Hidden Text)

1. What are some examples of ways to shorten up the procedure?
2. A quantitative experiment's data is represented by a ____ graph (fill in the blank)

[kate!]

Questions (Click to Show Hidden Text)

1. What are some examples of ways to shorten up the procedure?
2. A quantitative experiment's data is represented by a ____ graph (fill in the blank)

Answers (Click to Show Hidden Text)

1. Use diagrams and just say "repeat" instead of writing everything out.
2. Line graph.
p.s. what would a qualitative experiment be represented by?

[dxu46]

Questions (Click to Show Hidden Text)

1. What are some examples of ways to shorten up the procedure?
2. A quantitative experiment's data is represented by a ____ graph (fill in the blank)

Answers (Click to Show Hidden Text)

1. Use diagrams and just say "repeat" instead of writing everything out.
2. Line graph.
p.s. what would a qualitative experiment be represented by?

Correct, and for a qualitative experiment any appropriate graph excepting a line graph would work (e.g. bar, etc.)

[kate!]

New Questions (Click to Show Hidden Text)

1. Write a sample rationale and hypothesis. Why is it important to have a rationale for your hypothesis?
2. Why would using a bar graph for a quantitative experiment and a line graph for a qualitative experiment not work?

[dxu46]

New Questions (Click to Show Hidden Text)

1. Write a sample rationale and hypothesis. Why is it important to have a rationale for your hypothesis?
2. Why would using a bar graph for a quantitative experiment and a line graph for a qualitative experiment not work?

Answers (Click to Show Hidden Text)

1. If a ball is rolled down ramps of different ramps, then it will roll the farthest on the ramp of the greatest height because there is more potential energy at the start of a higher ramp than the start of a lower ramp, so therefore there is more kinetic energy, so the ball will roll farther.  A rationale is important because it justifies your hypothesis (and it gives you points :D)
2. In a quantitative experiment, you are measuring change, and a bar graph doesn't show change.  In a qualitative experiment, you are comparing the IV levels, and a line graph doesn't compare.

[kate!]

New Questions (Click to Show Hidden Text)

1. Write a sample rationale and hypothesis. Why is it important to have a rationale for your hypothesis?
2. Why would using a bar graph for a quantitative experiment and a line graph for a qualitative experiment not work?

Answers (Click to Show Hidden Text)

1. If a ball is rolled down ramps of different ramps, then it will roll the farthest on the ramp of the greatest height because there is more potential energy at the start of a higher ramp than the start of a lower ramp, so therefore there is more kinetic energy, so the ball will roll farther.  A rationale is important because it justifies your hypothesis (and it gives you points :D)
2. In a quantitative experiment, you are measuring change, and a bar graph doesn't show change.  In a qualitative experiment, you are comparing the IV levels, and a line graph doesn't compare.

Great answers, your turn. (welp in the last practice experiment our group did- qualitative- our math guy used a line graph... it didn't work out well, now i know why)

[dxu46]

Questions (Click to Show Hidden Text)

1. Define "operationally defined"
2. Why wouldn't "the color of the floor" or "the humidity level" work as controlled variables?