Statistics: Basic Concepts

Getting Started

• 1

  What is Statistics? arrow_forward_ios ✓ This branch of math can help you to organize and interpret information. It’s used in a variety of fields, and it has many applications in daily life.
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  Key Terms arrow_forward_ios ✓ This lesson explores the difference between descriptive and inferential statistics. It provides a glossary of key terms, as well as an example of how to make inferences based on data.
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  Variables arrow_forward_ios ✓ Variables are characteristics or qualities that you might need to measure or count. Let’s talk about the different types of variables you might come across when analyzing data.
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  Frequency Tables arrow_forward_ios ✓ How frequently does a particular event occur? A frequency table offers a way to track this type of data, and express it in percentages.

Types of Graphs

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  Bar Charts arrow_forward_ios ✓ After you’ve created a table, you can visually present information using a bar chart. This lesson shows you how to make a bar chart that reflects the connection between two variables.
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  Pie Charts arrow_forward_ios ✓ Pie charts are often used to visually express percentages. We’ll show you how to make your own using a protractor.
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  Line Graphs arrow_forward_ios ✓ Line graphs can show growth or change over time. Let’s talk about the difference between independent and dependent variables, as well as how to “plot” your points.
• 8

  Histograms arrow_forward_ios ✓ A histogram is a great way to visually represent numerical or quantitative data. It can help you to easily identify patterns and compare categories or “bins.”
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  Frequency Polygons arrow_forward_ios ✓ You can turn a histogram or a frequency table into a frequency polygon. Frequency polygons are useful for comparing and contrasting data, as well as looking at overall distribution.

Other Fundamentals

• 10

  Mean, Median, and Mode arrow_forward_ios ✓ The three measures of central tendency are often calculated in statistics. We’ll explain why mean, median, and mode are important, and provide a real-world example.
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  Surveys arrow_forward_ios ✓ Surveys allow you to collect information from a group of people. We’ll discuss different survey formats, and how to ensure that a survey is accurate.
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  What is Sampling? arrow_forward_ios ✓ If you’re studying a large population, you might consider using sampling in order to get the data you need. We’ll explain how to come up with a proportionate, representative sample.
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  Sampling Methods arrow_forward_ios ✓ Let’s talk about probability sampling versus non-probability sampling, and the methods that fall into each category.
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  What is Probability? arrow_forward_ios ✓ Probability can help us to make informed decisions. Let’s take a look at how to break down probability into fractions.
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  Final Quiz arrow_forward_ios ✓ Take our 20-question quiz to see how much you've learned about statistics!