# MANG 575 Module 9: Confidence Intervals

## Objectives:

• Be able to define a point estimate
• Define level of confidence
• Construct a confidence interval for the population mean when the population standard deviation is known
• Construct a confidence interval for the population mean when the population standard deviation is unknown
• Construct a confidence interval for a population proportion
• Determine appropriate sample size

Chapter 9 – Textbook
Textbook Power Points (.pptx)

## Introduction:

The previous chapter assumed some information about the population such as the mean, standard deviation or shape of the distribution.  In many business situations, these values may not be known and in fact the reason for taking a sample is to estimate these values.  In fact, we may use the mean of a sample to estimate the mean of the population.

## Dr. Waller Lecture: Confidence Intervals (video)

Lecture Power Point (.pptx)

## Reflection:

Summary of this module.

## Practice Quiz

Practice Quiz for this module, feel free to take multiple times.

## Quizzes

Take the quiz for this module on Canvas.

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