Question

Refer to the accompanying data set of mean​ drive-through service times at dinner in seconds at...

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

85

85

116

116

118

118

146

146

270

270

100

100

124

124

156

156

118

118

176

176

184

184

125

125

154

154

166

166

211

211

133

133

110

110

129

129

126

126

128

128

329

329

311

311

175

175

108

108

155

155

136

136

134

134

223

223

212

212

296

296

148

148

98

98

235

235

239

239

188

188

129

129

93

93

132

132

240

240

139

139

152

152

197

197

168

168

122

122

68

68

146

146

199

199

146

146

140

140

140

140

200

200

175

175

114

114

141

141

177

177

149

149

159

159

134

134

166

166

135

135

188

188

195

195

228

228

192

192

353

353

240

240

235

235

251

251

234

234

231

231

301

301

213

213

200

200

187

187

190

190

170

170

87

87

102

102

53

53

175

175

108

108

147

147

177

177

155

155

174

174

76

76

150

150

142

142

101

101

124

124

159

159

167

167

119

119

133

133

313

313

151

151

129

129

186

186

145

145

123

123

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