Stats Professor | Statistics Video - Example 171.5

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Course Documents

Chapter 1 - Intro

Chapter 2 - Methods for Describing Sets of Data

Chapter 3 - Probability

Chapter 4 - Discrete Random Variables

Chapter 5 - Normal Random Variables

Chapter 6 - Sampling Distributions

Chapter 7 - Confidence Intervals

Chapter 8 - Tests of Hypothesis: One Sample

Chapter 9 - Confidence Intervals and Hypothesis Tests: Two Samples

Sample Exam I: Chapters 1 & 2

Sample Exam II: Chapters 3 & 4

Sample Exam III: Chapters 5 & 6

Sample Exam IV: Chapters 7 & 8

Example 171.5

Lecture Examples

Example 162 & 163

Complete Example

Example 161tech

Example 162/163tech

Example 165tech

Example 165.5tech

Example 166tech

Example 167tech

Example 171tech

Example 173tech

Example 171.5: A manager is worried about hiring older workers because he fears that they may be more likely to call out sick. He decides to look at the attendance records for sample of employees from the previous year. The data is given below. Find a 95% confidence interval for the average number of sick days used by a 53 year old employee.

Employee Age	18	28	38	48	58
Sick Days Last Year	15	12	9	5	2

S = 0.31623