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# Statistics

In this section you'll find study materials for statistics help. Use the links below to find the area of statistics you're looking for help with. Each study guide comes complete with an explanation, example problems, and practice problems with solutions to help you learn statistics.

### Study Guides

showing 21 - 30 of 216
• 21.

#### Introductory Statistics Practice Quiz

Introductory Statistics Practice Quiz Before you begin a statistics course, you may want to get an idea of what you know and what you need to learn. The test will answer some of these questions for you. The test consists of 50 multiple-choice questions covering ...

Source: LearningExpress, LLC
• 22.

#### Populations, Samples, and Variables Study Guide

Introduction to Populations, Samples, and Variables Numerical information permeates our lives. The morning weather report forecasts the chance of rain, and we make a decision as to whether or not to take an umbrella. Given the latest study results on the health ...

Source: LearningExpress, LLC
• 23.

#### Conducting a Study and Statistics Planning Study Guide

Introduction to Conducting a Study and Statistics Planning Statistics involves the collection and analysis of data. Both tasks are critical. If data are not collected in a sensible manner, no amount of sophisticated analysis will compensate. Similarly, ...

Source: LearningExpress, LLC
• 24.

#### Describing and Displaying Categorical Data Study Guide

Introduction to Describing and Displaying Categorical Data Population is the set of objects or individuals of interest, and that the sample is a subset of the population. When presented with a set of either population or sample values, we need to summarize ...

Source: LearningExpress, LLC
• 25.

#### Dotplots and Stem-and-Leaf Plots Study Guide

Introduction to Dotplots and Stem-and-Leaf Plots When numerical data are collected, we no longer have the counts for each category as we did for categorical data. Each observation is a number. We want to be able to display these numbers in a way that will ...

Source: LearningExpress, LLC
• 26.

#### Measures of Dispersion for Numerical Data Study Guide

Introduction to Measures of Dispersion for Numerical Data When describing a distribution, it is important to have some measure of where the middle is. With a little thought, we can see that, if we have a measure of the middle, we still need more information to ...

Source: LearningExpress, LLC
• 27.

#### Describing and Displaying Bivariate Data Study Guide

Introduction to Describing and Displaying Bivariate Data Often, two or more numerical measurements are taken on each observational unit. For example, the weight and length of each fish taken from a lake may be recorded. In studies of wetlands, the phosphorus ...

Source: LearningExpress, LLC
• 28.

#### Basic Ideas in Probability Study Guide

Introduction to Basic Ideas in Probability For most studies, we want to use the study to make decisions or to draw inferences about the research question. Before we are prepared to do this, we need to establish some understanding of probability, discrete and ...

Source: LearningExpress, LLC
• 29.

#### Discrete Probability Distributions Study Guide

Introduction to Discrete Probability Distributions Because some probability distributions occur frequently in practice, they have been given specific names. In this lesson, we will discuss three discrete probability distributions: the Bernoulli, the binomial, and ...

Source: LearningExpress, LLC
• 30.

#### Continuous Probability Distributions Study Guide

Introduction to Continuous Probability Distributions As was the case with discrete distributions, some continuous random variables are of particular interest. In this lesson, we will discuss two of these: the uniform distribution and the normal distribution. ...

Source: LearningExpress, LLC

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