# Textbook Notes for E Moliski

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## STA 309 Chapter Notes - Chapter 7: Probability Distribution, Probability Plot, Unimodality

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7. 1 the standard deviation as a ruler: z-score = (x mean) / standard deviation. 65 95 99. 7 rule (in a unimodal, symmetric distribution: 68% of values

View Document## STA 309 Chapter Notes - Chapter 8: Sampling Frame, Sampling Bias, Response Bias

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The sample size is what matters: size of sample determines what we can conclude from the data regardless of population size, size of population doesn"t

View Document## STA 309 Chapter Notes - Chapter 6: Random Variable, Standard Deviation, Bernoulli Trial

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6. 1 expected value of a random variable: random variable value is based off the outcome of a random event. Discrete random variable: all outcomes can

View Document## STA 309 Chapter Notes - Chapter 5: Sample Space, Mutual Exclusivity, Conditional Probability

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## STA 309 Chapter Notes - Chapter 4: Scatter Plot

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One quantitative variable measured against another quantitative variable. One must always ask if there is an association between two such variables. If

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