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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

Problem 1

11.9 Using the Model to Create a Prediction Interval

The least squares line for the relationship between the number of absences for a student and the student’s final grade from problem 31 was y-hat = -2.67X + 96.78. Find the 95% prediction interval for a student’s final grade given that the student was absent 7 times (n = 6, x-bar = 6.167, SSxx = 108.8333, S = 2.775554) .

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