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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

11.1 Creating the Least Squares Equation

In an earlier problem, we looked at data involving the frequency of chirps made by a ground cricket, at various ground temperatures. We showed that there was a significant linear relationship between temperature and the frequency of chirps. The data we used is below. Would it be a good idea to use the model to estimate the average chirp frequency when the temperature was 51 degrees? Why or why not?

Temp 88.6 71.6 93.3 84.3 80.6 75.2 69.7 82 69.4 83.3 78.6 82.6 80.6 83.5 76.3

Chirps 20 16 19.8 18.4 17.1 15.5 14.7 17.1 15.4 16.2 15 17.2 16 17 14.1