Roderick_April_MM207-05_Unit_3_Homework_Project[1]

# Roderick_April_MM207-05_Unit_3_Homework_Project[1] - 4.1#4...

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4.1 #4 A . No, because there may be an increased population. B. The lurking variables may be from an increase population that would increase a need for teachers, but while the population increases so does the demand for more prescription drugs which will result in a high cost prescription due to population increase and scarce recourses to make the drugs. An increase in the population would not necessarily result in an increase in teachers’ salary or in the cost of prescription drugs. However, an increase in the cost of living might result in both teacher salary and drug prescription cost to increase. 6 Pts 4.1 #8 x y 3 40 7 35 15 30 35 25 75 18 B. Strong, negative C. Missing line of best fit x y 3 40 7 35 15 30 35 25 75 18 x y x 2 y 2 xy 3 40 9 1600 120 7 35 49 1225 245

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15 30 225 900 450 35 25 1225 625 875 75 18 5625 324 1350 ∑x=135 ∑y=148 ∑x 2 =7133 ∑y 2 =4674 ∑xy3040 ) 29 . 38 )( 06 . 132 ( 19980 15200 21904 23370 18225 35665 ) 148 )( 135 ( 15200 ) 148 ( ) 4674 ( 5 ) 135
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Roderick_April_MM207-05_Unit_3_Homework_Project[1] - 4.1#4...

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