CHAPTER 8
Statistical Inference: Estimation for Single Populations
LEARNING OBJECTIVES
The overall learning objective of Chapter 8 is to help you understand estimating parameters of single populations, thereby enabling you to:
1. Estimate the population mean with a known population standard deviation with the z statistic, correcting for a finite population if necessary.
2. Estimate the population mean with an unknown population standard deviation using the t statistic and properties of the t distribution.
3. Estimate a population proportion using the z statistic.
4. Use the chi-square distribution to estimate the population variance given the sample variance.
5. Determine the sample size needed in order to estimate the population mean and population proportion.
Batteries and Bulbs: How Long Do They Last?
What is the average life of a battery? As you can imagine, the answer depends on the type of battery, what it is used for, and how it is used. Car batteries are different from iPhone batteries, which are different from flashlight batteries. Nevertheless, a few statistics are available on the life of batteries. For example, according to Apple, an iPhone 4 has up to 300 hours of life if kept in standby, without making any calls or running any applications. In a PCWorld study, several ...
Get Business Statistics: For Contemporary Decision Making, 8th Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
