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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 91 - 100 of 216
• 91.

#### Confidence Intervals Help

Introduction to Confident Intervals A distribution can provide us with generalized data about populations, but it doesn't tell us much about any of the individuals in the population. Confidence intervals give us a better clue as to what we can expect from ...

Source: McGraw-Hill Professional
• 92.

#### Sampling and Estimation Practice Test

Review the following concepts if necessary: Source Data and Sampling Frames Help

Source: McGraw-Hill Professional
• 93.

#### Assumptions and Testing Help

Introduction to Assumptions and Testing A hypothesis is a supposition. Some hypotheses are based on experience, some on reason, and some on opinion. A hypothesis can be ''picked out of the blue'' to see what would happen (or be likely to happen) under ...

Source: McGraw-Hill Professional
• 94.

#### Statistics and Forecast Help

Introduction to Forecast Let's revisit the ''USA hurricane scenario.'' The predicted path for Hurricane Emma shown in Fig. 6-3 is a hypothesis, not an absolute. The absolute truth will become known eventually, and a path for Emma will be drawn on a map with ...

Source: McGraw-Hill Professional
• 95.

#### Regression Help

Introduction to Regression—Paired Data Regression is a way of defining the extent to which two variables are related. Regression can be used in an attempt to predict things, but this can be tricky. The existence of a correlation between variables ...

Source: McGraw-Hill Professional
• 96.

#### Hypotheses, Prediction, and Regression Practice Test

Review the following concepts if necessary: Assumptions and Testing Help

Source: McGraw-Hill Professional
• 97.

#### Correlation Principles Help

Introduction to Correlation Principles Let's examine correlation a little more closely now. When two things are correlated, does one cause the other? Does a third phenomenon cause both? Is there any cause-and-effect relationship at all? People often conclude that ...

Source: McGraw-Hill Professional
• 98.

#### Causes and Effects Help

Introduction to Causes and Effects When two things are correlated, it's tempting to think that there is a cause-and- effect relationship involved. Examples abound; anyone who listens to the radio, reads newspapers, or watches television these days can't escape ...

Source: McGraw-Hill Professional
• 99.

#### Chaos, Bounds, and Randomness Help

Introduction to Chaos, Bounds, and Randomness Have you ever noticed that events seem to occur in bunches? This is more than your imagination. A few decades ago, this phenomenon was analyzed by Benoit Mandelbrot, an engineer and mathematician who worked for ...

Source: McGraw-Hill Professional
• 100.

#### Correlation, Causation, Order, and Chaos Practice Test

Review the following concepts if necessary: Correlation Principles Help

Source: McGraw-Hill Professional

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