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.

Restaurant X      Restaurant Y

82           101

116         128

121         151

148         117

267         179

179         136

119         107

150         119

161         133

210         124

336         129

303         135

173         224

108         216

159         291

149         127

97           98

232         137

238         243

185         141

157         143

199         198

172         144

119         146

66           141

201         144

179         155

119         135

143         174

174         130

188         243

198         232

237         251

199         238

349         233

308         166

215         82

198         104

179         57

188         170

106         79

152         144

172         141

155         95

171         122

159         148

170         128

119         184

138         153

314         128

Answer 1

finding confidence interval

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