Lecture 15

# Lecture 15 - Lecture 15 Material Covered in This Lecture:...

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Lecture 15 Material Covered in This Lecture: 1 Chapter 7, Section 7.1: Inference for the mean of a population. 1 1. The one sample t-confidence interval. A. T-table B. One sample t-confidence interval Recall the one sample z-confidence interval.

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Remark: (1). If the population is normal, this interval is exact. (2). If the population is not normal, this interval is approximately correct for large n (3). Margin of error= n s t *) ( Example (Example 7.1, p453): The following data are the amounts of vitamin C, measured in milligrams per 100 grams of blend (dry basis), for a random sample of size 8 from a production run: 26 31 23 22 11 22 14 31 Find a 95% confidence interval for μ, the mean vitamin C content of the CSB produced during this run. Solution: need mean and standard deviation of this data 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
23 2. The one sample t-test. Example (Example 7.2, p.454; Example 7.1, p453 continued): Test H 0 : μ= 40 versus H a : μ≠40.

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Example (Example 7.3, p.455; Example 7.1, p453 continued): Test H 0 : μ= 40 versus H a : μ< 40.
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## This note was uploaded on 07/25/2008 for the course STT 421 taught by Professor Nane during the Summer '08 term at Michigan State University.

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Lecture 15 - Lecture 15 Material Covered in This Lecture:...

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