Question

Refer to the accompanying data set of mean​ drive-through service times at dinner in seconds at two fast food restaurants. Construct a 90​% 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.

Restaurant X
84
118
121
149
267
184
120
155
166
211
336
311
173
109
159
153
98
237
237
180
158
200
167
122
60
197
175
113
140
175
191
203
233
196
352
306
211
193
183
185
105
149
173
157
176
152
168
123
139
305

Restaurant Y
99
126
149
121
173
133
106
120
127
128
133
134
231
212
290
123
93
133
239
141
142
202
144
140
141
145
159
132
166
132
242
232
246
239
230
165
85
105
50
170
73
142
138
103
125
144
130
180
151
125

Answer 1

The solution is done showing all steps with calculations and necessary explanations. Hope you can uderstand.