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The accompanying summary quantities resulted from a study in which x was the number of photocopy machines serviced during a routine service call and y was the total service time (min). n=15(y-7)²-22,308.07(-)² = 2001.55 (a) What proportion of observed variation in total service time can be explained by a linear probabilistic relationship between total service time and the number of machines serviced? (Give the answer to three decimal places.) (b) Calculate the value of the estimated standard deviation s. (Give the answer to three decimal places.) Se=________________ What is the number of degrees of freedom associated with this estimate? Need Help? Read It

The accompanying summary quantities resulted from a study in which x was the number of photocopy machines serviced during a routine service call and y was the total service time (min). n=15(y-7)²-22,308.07(-)² = 2001.55 (a) What proportion of observed variation in total service time can be explained by a linear probabilistic relationship between total service time and the number of machines serviced? (Give the answer to three decimal places.) (b) Calculate the value of the estimated standard deviation s. (Give the answer to three decimal places.) Se=________________ What is the number of degrees of freedom associated with this estimate? Need Help? Read It

Linear Algebra: A Modern Introduction
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter7: Distance And Approximation
Section7.3: Least Squares Approximation
Problem 31EQ
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The accompanying summary quantities resulted from a study in which x was the number of photocopy machines serviced during a routine service call and y was the total service time (min). n = 15 Σ(y - y)² = 22,308.07 Σ(y- y)² = 2604.55 (a) What proportion of observed variation in total service time can be explained by a linear probabilistic relationship between total service time and the number of machines serviced? (Give the answer to three decimal places.) (b) Calculate the value of the estimated standard deviation se. (Give the answer to three decimal places.) Se What is the number of degrees of freedom associated with this estimate? Need Help? Read It
Transcribed Image Text:The accompanying summary quantities resulted from a study in which x was the number of photocopy machines serviced during a routine service call and y was the total service time (min). n = 15 Σ(y - y)² = 22,308.07 Σ(y- y)² = 2604.55 (a) What proportion of observed variation in total service time can be explained by a linear probabilistic relationship between total service time and the number of machines serviced? (Give the answer to three decimal places.) (b) Calculate the value of the estimated standard deviation se. (Give the answer to three decimal places.) Se What is the number of degrees of freedom associated with this estimate? Need Help? Read It
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