Sample Test 3 (linear regression) calcs

# Sample Test 3 - rainfall x wheat y(in/yr(bushel/acre 12.9 62.5 7.2 28.7 11.3 52.2 19.6 80.6 8.8 41.6 10.3 44.5 15.9 73.3 13.1 54.4 data 90 80 70 60

This preview shows pages 1–3. Sign up to view the full content.

df8b18b8757d6cf679efd5baf977aa2a63e98409.xls data rainfall, x wheat, y (in/yr) (bushel/acre) 12.9 62.5 7.2 28.7 11.3 52.2 19.6 80.6 8.8 41.6 10.3 44.5 15.9 73.3 13.1 54.4 5 10 15 20 25 0 10 20 30 40 50 60 70 80 90 wheat, y rainfall (in/yr) wheat yield (bu/a)

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
df8b18b8757d6cf679efd5baf977aa2a63e98409.xls calculations rainfall, x wheat, y x^2 xy y^2 (in/yr) (bushel/acre) 12.9 62.5 166.41 806.25 3906.25 7.2 28.7 51.84 206.64 823.69 11.3 52.2 127.69 589.86 2724.84 19.6 80.6 384.16 1579.76 6496.36 8.8 41.6 77.44 366.08 1730.56 10.3 44.5 106.09 458.35 1980.25 15.9 73.3 252.81 1165.47 5372.89 13.1 54.4 171.61 712.64 2959.36 sums 99.10 437.80 1338.050 5885.050 25994.200 means 12.39 54.73 b1 num = 461.8 b1 den = 110.45 b1 = 4.1811 bushels/inch of rainfall b0 = 2.9310 bushels Equation of the best fitting straight line (the regression line): Y = 4.1811x + 2.9310 where: x is the annual rainfall in inches Y is the fitted wheat yield per acre in bushels r num = 461.8025 = b1 num (line 16) r den x term =
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 02/19/2011 for the course OM 210 taught by Professor Singer during the Spring '08 term at George Mason.

### Page1 / 5

Sample Test 3 - rainfall x wheat y(in/yr(bushel/acre 12.9 62.5 7.2 28.7 11.3 52.2 19.6 80.6 8.8 41.6 10.3 44.5 15.9 73.3 13.1 54.4 data 90 80 70 60

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online