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.

Restaurant X Restaurant Y

80                   101

119                 125

118                 149

151                 117

268                 175

182                 137

120                 111

153                 126

164                 127

213                 123

329                 137

312                 133

182                 226

117                 209

154                 288

143                 128

101                 98

232                 136

240                 247

181                 140

149                 146

195                 202

168                 146

124                 139

69                   136

206                 143

177                 154

114                 138

139                 165

169                 134

193                 240

197                 235

235                 251

190                 237

354                 234

305                 172

206                 86

194                 104

184                 53

192                 172

102                 82

150                 140

174                 145

153                 98

173                 125

159                 146

170                 133

120                 184

135                 152

313                 132

Answer 1