Stats 16

File: Lottaburgera.  At the an α=0.05 level of service, can Lottaburger conclude that the speed of service is different across the four restaurants in the chain?b.  If the chain concludes that there is a difference in speed of service, is there a particular restaurant the chain should focus its attention on? Use the appropriate test for multiple comparisons to support your decision. Use an α=0.05.    

Description

The speed of service (measured in seconds) from the time an order is placed until the order is received for 20 randomly sampled orders at each of four Lottaburger restaurants in central New Mexico.

Data

230 253 233

263 251

230

257

254

241 259

242

236

229

215 249

248

264 269

244

240

233

231 243

246 242 262 270
254

243

Restaurant 1	Restaurant 2	Restaurant 3	Restaurant 4
260	205	275		248
	246		236		251		244
	263			233		253		259
	249	220	272		257
		230	234	255	252
	240
238	223	256	235
		254		241		229		269
		242	226
211		264	268
239	265		270
190
	215	267
	231	261	250
		243	237
221
225		262
222
214	245