# Ch 3: Descriptive Statistics of Data Sets

Use our interesting video lessons to discover all the essentials about descriptive statistics of data sets. Quick quizzes accompanying each lesson offer you immediate feedback on your progress.

## Descriptive Statistics of Data Sets - Chapter Summary and Learning Objectives

Descriptive statistics can offer a clear overview of data. In this chapter, you'll meet the various types of descriptive statistics, find out how they're used and discover handy formulas to employ down the road. Complete the multiple-choice quizzes to gauge your learning, and feel free to ask the instructors if you're left with any questions. All of the topics below are addressed:

• Measures of central tendency
• Comparison of median and mean
• Standard deviation
• Significance of outliers

Video Objective
What is the Center in a Data Set? - Definition, Lesson & Quiz Identify how to find the number that summarizes the whole data set.
Mean, Median & Mode: Measures of Central Tendency Find out how the measures of central tendency relate to populations and samples.
How to Calculate Mean, Median, Mode & Range Demonstrate how to calculate each of the measures of central tendency.
Calculating the Mean, Median, Mode & Range: Practice Problems, Lesson & Quiz Practice the strategies for coming up with these measurements.
Unimodal & Bimodal Distributions: Definition, Examples & Quiz Explain when a bimodal or unimodal distribution is most appropriate.
The Mean vs the Median: Differences, Uses, Lesson & Quiz Compare when the median or the mean is best to describe information.
Spread in Data Sets: Definition, Example, Lesson & Quiz Define spread and determine which calculation should be used in specific circumstances.
Maximums, Minimums & Outliers in a Data Set: Lesson & Quiz Illustrate how to identify these essentials in data sets.
Quartiles & the Interquartile Range: Definition, Formulate & Examples Find out how quartiles and interquartile range are put into play to group and analyze given sets of data.
Finding Percentiles in a Data Set: Formula, Examples & Quiz Take a look at how finding percentiles in data sets can help organize and compare numbers.
Calculating the Standard Deviation Find out what standard deviation can divulge about your data.
The Effect of Linear Transformations on Measures of Center & Spread: Lesson & Quiz Discover how to manipulate your data with these transformations.
Population & Sample Variance: Definition, Formula & Examples Differentiate between sample and population variance.
Ordering & Ranking Data: Process, Example, Lesson & Quiz Examine how these procedures might be used in competitions and research analysis.

Final Exam
Chapter Exam

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