Question

Refer to the accompanying data set of mean​ drive-through service times at dinner in seconds at two fast food restaurants. Construct a 95​% 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.

Construct a 95​% confidence interval of the mean​ drive-through service times at dinner for Restaurant X.

Restaurant X	Restaurant Y
80	97
123	128
120	154
146	116
267	176
182	135
120	107
152	124
163	129
214	129
337	137
311	139
175	225
111	212
157	294
152	131
91	89
235	136
245	248
186	144
151	141
197	198
172	152
124	146
61	134
197	143
174	154
118	136
140	168
176	138
188	241
201	238
230	249
196	237
351	232
309	173
208	84
196	105
181	53
192	176
109	80
148	145
175	142
161	104
169	124
155	146
168	133
128	189
138	151
309	126

Answer 1