Stats 1 - prediction or decision about a population based...

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Chapter 1 Descriptive statistics -methods of organizing, summarizing, and presenting data . Graphical techniques -histograms, scatterplots, etc. Numerical techniques -mean, median, mode, etc. Inferential statistics -used to draw conclusions or inferences about characteristics of populations based on sample data Population -set of all items of interest in a statistical problem Parameter -a descriptive measure of a population Sample -a set of data drawn from the population Statistic -a descriptive measure of a sample
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Statistical Inference -the process of making an estimate,
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Unformatted text preview: prediction or decision about a population based on sample data. May not always be correct. As a result, we have built into the statistical inference a couple of measures of reliability. Confidence level-the proportion of times that an estimating procedure would be correct, if the sampling procedure were repeated a very large number of times. Significance level-how frequently the conclusion will be wrong in the long run. Make sure you read Appendix 1.A and 1.B (pages 9-14). It explains how to get started with Excel....
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Stats 1 - prediction or decision about a population based...

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