How to Do a Chi Square Test for AP Biology

0.0(0)
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Card Sorting

1/31

flashcard set

Earn XP

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

32 Terms

1
New cards

Null Hypothesis

Predicts no effect of the independent variable on the dependent variable.

2
New cards

Alternative Hypothesis

Predicts an effect of the independent variable on the dependent variable.

3
New cards

Chi Square

The value calculated in the statistical test to determine the significance of observed versus expected data.

4
New cards

Observed

The quantitative data collected during the experiment.

5
New cards

Expected

The values predicted before conducting the experiment, assuming no effect of the independent variable.

6
New cards

Degrees of Freedom

Used to determine the threshold value for comparing observed and expected data.

7
New cards

Statistical Significance

A determination of whether the observed data significantly differ from the expected data.

8
New cards

Critical Value

The value from a chi-square table used to assess whether to accept or reject the null hypothesis.

9
New cards

Application of Chi Square Test

Involves calculating χ² to evaluate hypotheses based on experimental data.

10
New cards

Coin Flipping Experiment

An example illustrating the application of the Chi Square test with expected results of a 1:1 ratio.

11
New cards

Hypothesis Testing

A method to make inferences or draw conclusions about a population based on sample data.

12
New cards

Null Hypothesis Acceptance

Occurs when observed data does not show significant differences from expected values.

13
New cards

Chi Square Equation

Used for comparing observed and expected frequencies to determine if there's a significant difference.

14
New cards

Summation Symbol

Indicates the total sum of the values in a statistical calculation.

15
New cards

Statistical Analysis

The process of collecting and analyzing data to identify patterns or trends.

16
New cards

Hypothesis Framework

Structure for testing statements about relationships between variables.

17
New cards

Alpha Level

The threshold probability used to determine significance, often set at 0.05.

18
New cards

Ripe Banana Experiment

A study that assesses spatial distribution preference of flies using a chi-square test.

19
New cards

Coin Flip Null Hypothesis

Indicates a prediction that a coin lands on heads 50% of the time and tails 50%.

20
New cards

Experimental Data

Data collected from observations or experiments that is used for analysis.

21
New cards

Coin Flip Alternative Hypothesis

Suggests deviations from a 1:1 heads to tails ratio.

22
New cards

Expected Frequency Calculation

Used to determine what the results would be if the null hypothesis were true.

23
New cards

Effect of Independent Variable

The influence that changes in one variable have on another variable.

24
New cards

Statistical Table Reference

A resource with critical values for determining significance based on degrees of freedom.

25
New cards

Observed vs. Expected Comparison

The central method in determining whether data supports or rejects hypotheses.

26
New cards

Chi Square Conclusion

The outcome of the chi-square test which indicates whether to reject or accept the null hypothesis.

27
New cards

Systematic Approach

A step-by-step method for solving chi-square problems.

28
New cards

Data Significance

Indicates whether the results of an experiment are meaningful or due to chance.

29
New cards

Coin Flip Data Calculation

The method of comparing observed results against expected outcomes in a coin flip experiment.

30
New cards

Behavioural Influence

In the fruit-fly experiment, refers to how the presence of bananas affects fly distribution.

31
New cards

Significant Difference Determination

Deciding if the difference between observed results and expected values is meaningful.

32
New cards

Chi Square Value Interpretation

Analyzing calculated chi-square values in context with critical values to draw conclusions.