Question

Refer to the accompanying data set of mean​ drive-through service times at dinner in seconds at two fast-food restaurants. Construct a

99​% confidence interval estimate of the mean​ drive-through service time for Restaurant X at​ dinner; then do the same for Restaurant Y. Compare the results.

Service Times (seconds)

Restaurant X					Restaurant Y
80 80	124 124	118 118	147 147	264 264	102 102	127 127	155 155	112 112	174 174
183 183	119 119	149 149	164 164	216 216	133 133	112 112	120 120	133 133	125 125
336 336	307 307	173 173	110 110	155 155	138 138	133 133	229 229	210 210	295 295
151 151	93 93	236 236	238 238	185 185	124 124	93 93	135 135	247 247	142 142
156 156	198 198	170 170	117 117	66 66	139 139	203 203	151 151	146 146	135 135
197 197	179 179	115 115	145 145	175 175	152 152	152 152	137 137	164 164	135 135
186 186	200 200	228 228	196 196	356 356	245 245	236 236	249 249	232 232	228 228
303 303	211 211	200 200	179 179	190 190	164 164	82 82	108 108	54 54	168 168
108 108	145 145	177 177	152 152	167 167	80 80	149 149	140 140	103 103	125 125
154 154	168 168	125 125	132 132	312 312	149 149	135 135	183 183	151 151	128 128

Answer 1