Chapter 11 HW

# Chapter 11 HW - Chapter 11 For Problems 1-3 use the...

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Chapter 11 For Problems 1-3, use the following information for students in a certain class. Average weight: 150 pounds SD for weight: 20 pounds Average height: 68 inches SD for height: 2.5 inches Correlation ( r ): 0.6 1. a) Predict the weight of a student who is 64 inches tall, and give an RMS error for your prediction. b) Approximately what percentage of the students who are 64 inches tall will weigh between 134 and 166 pounds? c) Approximately what percentage of all students (regardless of height) will weigh between 134 and 166 pounds? 2. a) Predict the height of a student who weighs 170 pounds, and give an RMS error for your prediction. b) Approximately what percentage of students who weigh 170 pounds will be between 63 and 73 inches tall? c) Approximately what percentage of all students (regardless of weight) will be between 63 and 73 inches tall? 3. a) Should the RMS error for weight change from Problem 1a) if the student is 70 inches tall? b) Give the RMS error for height for a student weighing 140 pounds.

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## This note was uploaded on 04/07/2008 for the course MATH 1680 taught by Professor Patton during the Spring '08 term at North Texas.

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Chapter 11 HW - Chapter 11 For Problems 1-3 use the...

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