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lecture13 - • Will finish chapter 13 today and begin...

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Unformatted text preview: • Will finish chapter 13 today and begin chapter 14 • So far have done chapters 1-14 • Will be doing chapters 15-19 in the coming weeks • Suggested problems: 12.5, 12.11, 12.13, 12.15, 12.19, 12.31 • 13.5, 13.17, 13.19, 13.25, 13.30 • 14.5, 14.9, 14.15, 14.23 • Standard scores – You can convert any Normal Density into one with a mean of 0 and a SD of 1 • Why is this important? • The distribution of the heights of young men is approximately normal with a mean of 70 inches and standard deviation of 2,5 inches • What is the standard score for a height of 72 inches? • What is the probability of randomly selecting a young man with a height less than 72 inches • On an IQ test for the 20-34 year old age group, the scores are approximately normally distributed with a mean of 110 and standard deviation of 15 • Sarah scores 130 on the test • What is her standard score? • What percentile was her score? • Important use of statistics has to do with uncovering relationships between variables • Allows one to explore relationships that are hypothesized or to discover potentially new ones •...
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lecture13 - • Will finish chapter 13 today and begin...

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