Question: 2.17 Consider the following data set in which nitrogen dioxide concentrations in parts per million are collected for 26 days in September 1984 at a
2.17 Consider the following data set in which nitrogen dioxide concentrations in parts per million are collected for 26 days in September 1984 at a monitoring facility in the San Francisco Bay area. These data were taken from Chatterjee and Hadi (1988).
*i Windspeed X2 Maximum x3 Insolation ;e mph) 11.1 12.1 12.0 17.8 9.5 7.2 11.5 13.4 10.8 13.8 14.6 12.1 8.0 8.8 12.9 12.7 12.1 11.1 11.3 9.0 9.2 8.4 8.0 13.8 17.8 Temperature (°F) 90 86 80 70 90 100 92 74 87 78 73 85 94 91 84 68 81 78 74 78 84 90 90 80 68 (langleys per day) 382 380 372 352 358 362 302 316 339 328 278 339 241 193 268 113 313 317 324 312 349 290 295 283 259 NO 6 5 5 3 7 9 6 2 10 7 3 4 13 10 7 3 6 5 4 9 11 8 9 6 2
(a) Fit a standard multiple regression model to these data and comment on model adequacy.
(b) Consider a transformation for the response. Use the Box-Cox procedure to determine an appropriate transformation.
(c) Does a model with transformed response seem more reasonable than the model in part (a)?
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