Chapter 3 Descriptive Statistics: Numerical Measures

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11SlideChapter 3Descriptive statistics : Numerical Measures2SlideLearning objectives1. Single variable Part I (Basic) How to calculate and use the Measures of How to calculate and use the Measures of variability2. Single variable Part II (Application) Understand what the Measures of location ( , mean,median, mode) tell us about distribution shape -Discuss its use in manipulating simulated How to detect outliers using z-score and empirical How to use Box plot to explore data How to calculate weighted mean How to calculate mean and variance for grouped data3. Two How to calculate and use the Measures of association-Covariance, Correlation 1. Numerical Measures Part InNumerical measuresnMeasures of Location Mean, median, mode, percentiles, quartilesnMeasures of Variability Range, interquartilerange, variance, standard deviation, coefficient of variation4SlideNumerical MeasuresIf the Measures are computedfor data from a sample,they are called sample the Measures are computedfor data from a population,they are called population sample statistic is referred toas the point estimatorof thecorresponding population meanof a data set is the average of all the data sample mean is the point estimator of the population mean.

1 Slide 1 Chapter 3 Descriptive Statistics: Numerical Measures Slide 2 Learning objectives 1. Single variable –Part I (Basic) 1.1. How to calculate and use the measures …

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