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MODR 2640 Lecture : R November 17, 2011.pdf

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brownmuskrat867
19 Nov 2012
School
York University
Department
Modes Of Reasoning
Course
MODR 2640
Professor
all

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Document Summary

Commutation (p v q) (q v p) (p q) (q p) Association p v (q v r) (p v q) v r p (q v r) (p q) r. Distribution p (q v r) (p v q) v (p r) p v (q r) (p v q) (p v r) Contraposition (contra) (p q) (~q ~p) Implication (impl) (p q) (~p v q) Exportation (exp) (p q) r p (q r) Tautology (taut) p p q p p v q.

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Related Questions

ANSWER THE FOLLOWING QUESTIONS FOR EACH DATA SET

1) Are the variables cross section or time series data?

2) How do you imagine that the data were collected?

3) Is the sample size sufficient to yield a good estimate? How do you know?

4) State you hypothesis about the sign of the slope.

5) Make a scatter plot of Y against X. Discuss what this tells you.

6) Add a Trendline to your scatter plot. Is a linear model credible?

7) Interpret the slope coefficient. Does the intercept have meaning given the range of the data?

8) Use Megastat to fit the regression model, including residuals and standardized residuals

9) Interpret the P-value for the slope coefficient

10) Interpret the R^2 value

11) Study the table of residuals. Identify outliers, and unusual observations (standardized obs. that exceed 3, and 2 std. deviations respectively).

12) Output a normal probability plot. Do you see evidence that your regression violates the assumption of normality?

13) Inspect the residual plot to check for heteroscedasticity. Report your conclusions.

14) Identify any observations with high leverage.



Median Income and Median Home Price in Selected Eastern Cities (n = 34)
City Income Home
Alexandria, VA 59.976 290.000 Note: All values are in thousands of dollars.
Bernards Twp., NJ 112.435 279.900
Brentwood, TN 107.866 338.250 Key: Income = median family income (thousands)
Bridgewater, NJ 93.484 316.000 Home = median home price (thousands)
Cary, NC 77.091 207.000
Centerville, VA 77.243 250.000
Chantilly, VA 94.864 320.000
Chesapeake, VA 53.758 150.000
Collierville, TN 85.716 230.000
Columbia, MD 77.033 199.000
Coral Springs, FL 62.632 218.500
Dranesville, VA 109.502 290.000
Dunwoody, GA 86.971 315.000
Ellicott City, MD 83.583 248.000
Franconia, VA 84.537 290.000
Gaithersburg, MD 64.944 220.000
Hoover, AL 64.431 170.450
Hunter Mill, VA 93.987 290.000
Lower Makefield Twp., PA 102.997 205.000
Manalapan Twp., NJ 91.245 410.000
Marlboro Twp., NJ 108.759 379.975
Matoaca, VA 65.149 135.000
Newtown, CT 97.723 358.500
North Andover, MA 79.169 342.500
Oakton, VA 90.824 341.000
Olney, MD 100.716 287.450
Peachtree City, GA 79.805 214.500
Ramapo, NY 64.954 330.875
Randolph Twp., NJ 104.121 444.500
Reston, VA 85.264 240.000
Roswell, GA 76.530 226.450
Sugarland Run, VA 103.350 278.250
Sully, VA 92.942 290.000
Wellington, FL 76.076 230.000
Cruise Speed and Horsepower of Single-Engine Aircraft (n = 52)
Obs Mfgr/Model Year Cruise TotalHP
1 AMD CH 2000 2000 100 116
2 Beech Baron 58 1984 200 600
3 Beech Baron 58P 1984 241 650
4 Beech Baron D55 1968 199 570
5 Beech Bonanza B36 TC 1982 174 300
6 Beech Duchess 1982 164 360
7 Beech Sierra 1972 141 360
8 Bellanca Super Viking 1973 161 300
9 Cessna 152 1978 107 110
10 Cessna 170B 1953 104 145
11 Cessna 172 R Skyhawk 1997 122 160
12 Cessna 172 RG Cutlass 1982 129 180
13 Cessna 182Q Skylane 1977 144 230
14 Cessna 310 R 1975 194 570
15 Cessna 337G Skymotor II 1975 170 420
16 Cessna 414A 1985 223 620
17 Cessna 421B 1974 234 750
18 Cessna Cardinal 1970 124 180
19 Cessna P210 1982 186 285
20 Cessna T210K 1970 190 285
21 Cessna T303 Crusader 1983 190 500
22 Cessna Turbo Skylane RG 1979 159 235
23 Cessna Turbo Skylane T182T 2001 160 235
24 Cessna Turbo Stationair TU206 1981 148 310
25 Cessna U206H 1998 143 300
26 Cirrus SR20 1999 160 200
27 Diamond C1 Eclipse 2002 140 125
28 Extra Extra 400 2000 235 350
29 Lancair Columbia 300 1998 191 310
30 Liberty XL-2 2003 132 125
31 Maule Comet 1996 115 180
32 Mooney 231 1982 170 210
33 Mooney Eagle M205 1999 175 244
34 Mooney M20C 1965 156 200
35 Mooney Ovation 2 M20R 2000 188 280
36 OMF Aircraft Symphony 2002 128 160
37 Piper 125 Tri Pacer 1951 107 125
38 Piper 6X 2004 148 300
39 Piper Archer III 1997 129 180
40 Piper Aztec F 1980 191 500
41 Piper Dakota 1979 147 235
42 Piper Malibu Mirage 1998 213 350
43 Piper Saratoga II TC 1998 186 300
44 Piper Satatoga SP 1980 148 300
45 Piper Seneca III 1982 180 440
46 Piper Seneca V 2002 186 440
47 Piper Super Cab 1975 100 150
48 Piper Turbo Lance 1979 176 300
49 Rockwell Commander 114 1976 151 260
50 Sky Arrow 650 TC 1998 98 81
51 Socata TB20 Trinidad 1999 163 250
52 Tiger AG-5B 2002 143 180