Introduction To Statistics And Data Analysis
6th Edition
ISBN: 9781337794503
Author: PECK
Publisher: Cengage
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Textbook Question
Chapter 13, Problem 9CRE
Consider the following data on y = Number of songs stored on an MP3 player and x = Number of months the user has owned the MP3 player for a sample of 15 owners of MP3 players.
- a. Construct a
scatterplot of the data. Does the relationship between x and y look approximately linear? - b. What is the equation of the estimated regression line?
- c. Are the assumptions of the simple linear regression model reasonable? Justify the answer using appropriate graphs.
- d. Is the simple linear regression model useful for describing the relationship between x and y? Test the relevant hypotheses using a significance level of 0.05.
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Q.1.1 By completing the table below and then applying the relevant formulae, determine the line of best fit for this bivariate data set.
Do NOT change the units for the variables.
X
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xy
Ex=
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Q.1.3 Using your calculator, determine the coefficient of correlation for the data set.
Interpret your answer.
Q.1.4 Compute the coefficient of determination for the data set.
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Chapter 13 Solutions
Introduction To Statistics And Data Analysis
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