Temp.Long.Lat.txt City JanTemp Lat Long Mobile,AL 44 31.2 88.5 Montgomery,AL 38 32.9 86.8 Phoenix,AZ 35 33.6 112.5 LittleRock,AR 31 35.4 92.8 LosAngeles,CA 47 34.3 118.7 SanFrancisco,C 42 38.4 123.0 Denver,CO 15 40.7 105.3 NewHaven,CT 22 41.7 73.4 Wilmington,DE 26 40.5 76.3 Washington,DC 30 39.7 77.5 Jacksonville,FL 45 31.0 82.3 KeyWest,FL 65 25.0 82.0 Miami,FL 58 26.3 80.7 Atlanta,GA 37 33.9 85.0 Boise,ID 22 43.7 117.1 Chicago,IL 19 42.3 88.0 Indianapolis,IN 21 39.8 86.9 DesMoines,IA 11 41.8 93.6 Wichita,KS 22 38.1 97.6 Louisville,KY 27 39.0 86.5 NewOrleans,LA 45 30.8 90.2 Portland,ME 12 44.2 70.5 Baltimore,MD 25 39.7 77.3 Boston,MA 23 42.7 71.4 Detroit,MI 21 43.1 83.9 Minneapolis,MN 2 45.9 93.9 St.Louis,MO 24 39.3 90.5 Helena,MT 8 47.1 112.4 Omaha,NE 13 41.9 96.1 Concord,NH 11 43.5 71.9 AtlanticCity,NJ 27 39.8 75.3 Albuquerque,NM 24 35.1 106.7 Albany,NY 14 42.6 73.7 NewYork,NY 27 40.8 74.6 Charlotte,NC 34 35.9 81.5 Raleigh,NC 31 36.4 78.9 Bismarck,ND 0 47.1 101.0 Cincinnati,OH 26 39.2 85.0 Cleveland,OH 21 42.3 82.5 OklahomaCity,OK 28 35.9 97.5 Portland,OR 33 45.6 123.2 Harrisburg,PA 24 40.9 77.8 Philadelphia,PA 24 40.9 75.5 Charleston,SC 38 33.3 80.8 Nashville,TN 31 36.7 87.6 Amarillo,TX 24 35.6 101.9 Galveston,TX 49 29.4 95.5 Houston,TX 44 30.1 95.9 SaltLakeCity,UT 18 41.1 112.3 Burlington,VT 7 45.0 73.9 Norfolk,VA 32 37.0 76.6 Seattle,WA 33 48.1 122.5 Spokane,WA 19 48.1 117.9 Madison,WI 9 43.4 90.2 Milwaukee,WI 13 43.3 88.1 Cheyenne,WY 14 41.2 104.9

The data in Temp.Long.Lat.txt give the average (over the years 1931 to 1960) daily minimum January

temperature in degrees Fahrenheit with the latitude and longitude of 56 US cities.

(a) Construct a scatterplot matrix of the data. Does lon-gitude or latitude appear to be the better predictor

of a city's temperature? Explain in terms of this plot.

1(b) Construct a 3D scatterplot of the data. Does longitude or latitude appear to be the better predictor of

a city's temperature? Explain in terms of this plot.