'Z table' diaporamas de présentation

Descriptive Statistics I REVIEW

Descriptive Statistics I REVIEW. Measurement scales Nominal, Ordinal, Continuous (interval, ratio) Summation Notation: 3, 4, 5, 5, 8 Determine: ? X, ( ? X) 2 , ? X 2 9+16+25+25+64 25 625 139 Percentiles: so what?. Measures of central tendency Mean, median mode 3, 4, 5, 5, 8

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Points in Distributions

Points in Distributions. Up to now describing distributions Comparing scores from different distributions Need to make equivalent comparisons z scores standard scores Percentile, Percentile rank ~. Standard Scores. Convert raw scores to z scores

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Converting to a Standard Normal Distribution

Converting to a Standard Normal Distribution. Think of me as the measure of the distance from the mean, measured in standard deviations. is used to compute the cumulative probability given a z value. NORMSDIST.

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Hypothesis Testing with z Tests

Hypothesis Testing with z Tests. Chapter 7. The z Table. Benefits of standardization: allowing fair comparisons z table: provides percentage of scores between the mean and a given z score. Raw Scores, z Scores, and Percentages. Step 1: Convert raw score to z score

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Lecture 1 Review of Biostatistics

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The Normal Distribution and Microsoft Excel

The Normal Distribution and Microsoft Excel. Say a company has developed a new tire for cars. In testing the tire it has been determined the distribution of miles driven is normal and that the mean tire mileage is 36,500 miles and the standard deviation is 5000 miles.

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HS 167 Test Prep

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