The accompanying sumary quantities resulted from a study in which x was the numb

Question

The accompanying sumary 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). 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.) Claculate the value of the estimated standard deviation S_e^- (Give the answer to three decimal places.) s_e = What is the number of degrees of freedom associated with this estimate?

Explanation / Answer

a)   proportion variation in total service time can be explained is 2609.54 / 22358.07 =0.1167 = 11.67%

b)

Se = srqt ( 2609.54 / 14 ) = 13.65

degree of freedom : 15 - 1= 14

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