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Copyright © Rebecca Rehder Wingerden Designing a Controlled Experiment AP Biology Designing a Controlled Experiment Baseline Investigation: (control group) • Part I: Pillbug Behavior: - Table 1: General Observation of Pillbug Behavior - Table 2: Pillbug Taxis: Data Collection - Analysis Chi-square: Chi-square Calculation, Degrees of Freedom, Chi-square Statement (see board) - Approved Variable Copyright © 2012 Rebecca Rehder Wingerden Bozeman Science: Chi-squared Test (12:00 min.) http://www.bozemanscience.com/chi-squared-test Copyright © 2012 Rebecca Rehder Wingerden Distributive Behaviors Drawing Table 1: General Observations of Pill Bug Behavior Designing a Controlled Experiment Copyright © 2012 Rebecca Rehder Wingerden Time # of Pillbugs Side A # of Pillbugs - Side B 1 2 3 4 5 6 7 8 9 10 Average Table 2: Baseline- Pillbug Taxis Designing a Controlled Experiment

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Designing a Controlled Experiment

AP Biology Designing a Controlled ExperimentBaseline Investigation: (control group) • Part I: Pillbug Behavior:

- Table 1: General Observation of Pillbug Behavior - Table 2: Pillbug Taxis: Data Collection - Analysis Chi-square: Chi-square Calculation,

Degrees of Freedom, Chi-square Statement (see board)

- Approved Variable

Bozeman Science: Chi-squared Test (12:00 min.) http://www.bozemanscience.com/chi-squared-test

Distributive Behaviors Drawing

Table 1: General Observations of Pill Bug Behavior

Designing a Controlled Experiment

Time # of Pillbugs Side A # of Pillbugs - Side B

Average

Table 2: Baseline- Pillbug Taxis

Designing a Controlled Experiment

Designing Your Investigation (on a whiteboard): • Part II: Pillbug Behavior:

- Purpose: method that will be used, IV and DV. - Hypothesis: If (IV), then (DV), because… - Procedure: Steps discussing how you will modify

the procedure: IV, DV, control and standardized variables.

- Data: table(s) to record findings - Instructor’s Approval

Pill bug behavior and environmental preference. Post Lab Analysis: • Table 2: Pillbug Taxis with Altered (Your group’s

variable) Environmental Condition • Chi-square Analysis #2: Chi-square Calculation,

Degrees of Freedom, Chi-square Statement (see board)

Designing a Controlled Experiment

Post Lab Conclusion (CER): • Restate the purpose of this experiment. • Restate your hypothesis for this experiment. • Statement that answers the following question, “Do the results of your experiment support or refute your hypothesis?”

• Then, list and explain, in detail, how the data that you collected led you to your statement.

• Include statistical test(s) to support your statement. • Therefore, in conclusion… remember your experimental purpose.

Designing a Controlled Experiment

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