Sample Regression Questioins

1 ? Please do not print this unless you really exact to. Question 1 The personnel handler of a manufacturing high society has collected the following data on the Salary earn by apiece machinist in the factory along with the modal(a) performance grade over the by 3 years, the years of service and the number of different machines each employee is conscious to operate. Avg eld Performance of S. No. Salary valuation servicing Certifications 1 48.20 3.50 9 6 2 55.30 5.30 20 6 3 53.70 5.10 18 7 4 61.80 5.80 33 7 5 56.40 4.20 31 8 6 52.50 6.00 13 6 7 54.00 6.80 25 6 8 55.70 5.50 30 4 9 45.10 3.10 5 6 10 67.90 7.20 47 8 11 53.20 4.50 25 5 12 46.80 4.90 11 6 13 58.30 8.00 23 8 14 59.10 6.50 35 7 15 57.80 6.60 39 5 16 48.60 3.70 21 4 17 49.20 6.20 7 6 18 63.00 7.00 40 7 19 53.00 4.00 35 6 20 50.90 4.50 23 4 21 55.40 5.90 33 5 22 51.80 5.60 27 4 23 60.20 4.80 34 8 24 50.10 3.90 15 5 Sum 1308.00 128.60 599.00 average 54.50 5.36 24.96 6.00 stdev 5.47 1.29 11.22 1.32 Covariance(Y,X (i)) 4.52 50.55 3.86 ?( profits(i) - 54.50) = 689.26 2 The personnel director would like to take a regression vex to number the average salary an employee should expect to receive. a) If the regression beat is to be built utilise only one self-sufficing variant, which variable should be utilize? Explain why.

b) What is the proportion of variation in salary that tolerate be explained by this variable? c) A regression model using average performance rating is fitted to the data. Given that the stop over for the model is 39.35, the slope is 2.83 and the R square value is 0.445, counter the salary range for an employee with 12 years of service, who has received average revi ews of 4.5, and is certified to operate 4 pi! eces of machinery? d) A regression model (Model 1) is built using Certifications and Years of Service as the independent variables. The Summary widening and residual Output are stipulation below. Complete the Summary Output by filling in ALL the missing entries. thickset OUTPUT Regression Statistics...If you urgency to get a amply essay, order it on our website: OrderEssay.net

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