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In: Statistics and Probability

An office supply company services copiers and tracks how many machines are serviced and the length...

An office supply company services copiers and tracks how many machines are serviced and the length of time (in minutes) for a service call. The data below for 11 clients is below. Sum X = 46 Sum Y= 234 Sum XY = 5797 Sum X2 =1180 Sum Y2 =146608 7) Calculate the calculated t statistic for testing the slope coefficient. 8) Calculate the calculated t statistic for testing the correlation coefficient. 9) Find the residuals for observations #2 (X = 4 ; Y = 109) and #4 (X = 7; Y = 189)

Solutions

Expert Solution

7)

Answer: t = 1.338

(8)

Answer: t = 1.338

(9)

Residual = observed - Predicted = 109 - 20.39 = 88.61

-------------------------------------------------------------

Residual = observed - Predicted = 189- 35.02 = 153.98

orchestra answered 2 years ago
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