The manager of a store would like to know if the average daily sales (measured in dollars) through her website are any different than her in-store sales. What is the lower bound of the 95% confidence interval for the difference in sales? Use the data in file Online_vs_Instore.xlsx for your analysis. (answers represents dollar amounts)

On-line	In-Store
805.45	1400.76
780.27	969.27
927.79	1049.61
812.86	1453.6
550.91	876.72
901.07	1119.49
869.76	976.6
867.17	1017.76
801.91	482.12
973.15	1149.21
746.65	809.37
980.25	968.43
892.53	1077.45
871.39	1166.04
970.98	582.81
641.09	766.93
1051.25	955.73
809.82	562.64
721.97	786.01
798.97	1369.56
983.14	1219.63
1124.83	556.64
801.21	678.46
932.67	370.61
724.8	587.05
894.94	1203.42
1017.18	555.95
876.98	1104.13
961.01	722.83
930.66	1082.07
882.56	840.62
853.19	823.12
983.99	792.55
1016.78	619.14
858.44	1212.75
748.53	1423.27
742.14	1155.01
916.54	753.26
1008.92	1066.35
785.11	1087.33
962.46	1018.6
818.67	907.18
849.03	1283.63
552.5	1319.92
728.71	530.62
747.62	710.89
1194.59	1150.54
586.63	946.98
916.22	1358.48
1025.76	1589.44
877.63	1165.92
835.7	1035.52