AP Bio Unit 1: Exp Design + Stats

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Statistics

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Methods used to collect, process, or interpret quantitative data

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Descriptive Statistics

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Methods used to summarize or describe observations/samples, including measures of central tendency and variability

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Inferential Statistics

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Using observations to make estimates or predictions, generalizing from a sample to a wider population; includes standard error of the mean, confidence intervals, and Chi square hypotheses testing

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Central Tendencies

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Ways to describe the center of our data- includes mean, median, mode

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Mean

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The average of a data set

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Median

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The middle number in a range of data points

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Mode

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The value that appears most often in a data set

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Scientific Method

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A step-by-step process used by scientists to investigate questions, gather evidence, and draw conclusions based on experiments and observations

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Hypothesis

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A testable explanation for an observation that explains the relationship between variables

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Null Hypothesis

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Hypothesis that there is no effect or no difference between two groups of data