Flashcards
Chi-Squared Test
Flashcards do conjunto (11)
- 1What is the Chi-squared test?Inferential statistical test which is used to test the significance of the difference between expected results and actual observed results.
- 2What does the significance of the Chi-squared test mean?Testing to see if the difference between the two values is small enough to be due to chance alone.
- 3When may the Chi-Squared test be used?When a strong, evidence-supported biological theory has been used to generate the expected figures, and when categorical data has been collected. It relies on large sample sizes as small tests won't produce reliable results.
- 4What is the equation of the Chi-Squared test?
- 5Mendel's pea plant dihybrid cross
- 6Chi squared value for Mendel's pea plant dihybrid cross
- 7Degrees of freedom (diagram)
- 8As the Chi-Squared value increases, what does this mean?It is more likely that there is significant difference between the observed values and expected values, suggesting that the experimental hypothesis will need to be accepted.
- 9The smaller the Chi-Squared value means what?The less likely that there is a significant difference, and so any difference there is will be down to chance. This would mean that the null hypothesis would be rejected, and the NULL HYPOTHESIS can be accepted.
- 10What are the Degrees of Freedom?Always the number of categories, minus one. If there are four classes, the Df would be three.
- 11How is the Critical value found?using the probability chosen to accept that the results aren't due to chance, and that there isn't significance in differences observed. Usually p=0.05 will be chosen for this.
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- A level Biology FlashCards sobre Chi-Squared Test, criado por Sara R em 17-02-2017.
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- Sara R
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