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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
Lecture Examples
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