Chapter Summary 115 2 Chapter Summary Example(s) Review Exercises What Did You Learn? Section 2.1 How to construct frequency distributions, frequency histograms, frequency polygons, relative frequency histograms, and ogives 1–7 1–6 Section 2.2 How to graph and interpret (1) quantitative data sets using stem-and-leaf plots and dot plots, (2) qualitative data sets using pie charts and Pareto charts, and (3) paired data sets using scatter plots and time series charts 1–7 7–12 Section 2.3 How to find the mean, median, and mode of a population and of a sample 1–6 13, 14 How to find a weighted mean of a data set, and how to estimate the sample mean of grouped data 7, 8 15–18 How to describe the shape of a distribution as symmetric, uniform, or skewed, and how to compare the mean and median for each 19–24 Section 2.4 How to find the range of a data set, and how to find the variance and standard deviation of a population and of a sample 1–4 25–28 How to use the Empirical Rule and Chebychev’sTheorem to interpret standard deviation 5–7 29–32 How to estimate the sample standard deviation for grouped data 8, 9 33, 34 How to use the coefficient of variation to compare variation in different data sets 10 35, 36 Section 2.5 How to find the first, second, and third quartiles of a data set, how to find the interquartile range of a data set, and how to represent a data set graphically using a box-and-whisker plot 1–4 37–42 How to interpret other fractiles such as percentiles, and how to find percentiles for a specific data entry 5, 6 43, 44 How to find and interpret the standard score (z-score) 7, 8 45–48 Study Strategies Basic Reading Strategies Reading is an important skill for your college courses. You can improve your reading skills if you are motivated and willing to practice. • Find an environment that is as distraction-free as possible. Read in short sessions to increase retention. • Preview what you are about to read. Adjust your reading strategy based on the material you are reading. • To promote understanding, ask questions while reading. Take notes or make annotations. Connect to information you already know. Use imagery and find examples to illustrate concepts. Re-read material you do not understand. For more information, visit Skills for Success in the accompanying MyLab course.
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