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Published byLiana Shackford Modified over 2 years ago

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What is statistics? “Statistics is the study of the collection, organization, analysis, and interpretation of data.”

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How tall are students in this class? How can we answer this question? What data would you need to collect?

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How tall are students in this class? MEAN: Mean = 69.30

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How tall are students in this class? S = 4.84 STANDARD DEVIATION:

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Mean = 8.88 Std Dev = 1.90 Mean = 9.02 Std Dev = 3.77

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How tall are students in Michigan? How can we answer this question? Would you need a different sample compared to our previous question?

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How tall are students in Michigan? STANDARD ERROR: SE = 0.80

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Are students in Michigan taller than students in Ohio?

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SQUARED! Half the class gets bean type 1, half the class bean type 2 Do the two types of beans have different lengths?

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MEAN: STANDARD DEVIATION: STANDARD ERROR:

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There are two statistical tests for mean: 1) z test – Used for large samples (n ≥ 30) 1) t test – Used for small samples (n < 30)

There are two statistical tests for mean: 1) z test – Used for large samples (n ≥ 30) 1) t test – Used for small samples (n < 30)

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