The following data represent the times recorded by nine 100yard backstroke swimmers, in seconds, before and after they participated in a new training program These data can also be found in the Excel file backstroke xlsx Using Icirc plusmn 0 05, perform a hypothesis test to determine if the new program effectively reduced swimming times for the 100yard backstroke Swimmer 2 3 4 5 6 7 8 9 Before 75 76 67 72 73 66 63 72 69 71 74 65 68 72 70 60 67 65 Afler 71 74 65 6 72 70 60 57

Question: The following data represent the times recorded by nine 100yard backstroke swimmers, in seconds, before and after they participated in a new training program. These

The following data represent the times recorded by nine 100yard backstroke swimmers, in seconds, before and after they participated in a new training program. These data can also be found in the Excel file backstroke.xlsx.

Using Î± = 0.05, perform a hypothesis test to determine if the new program effectively reduced swimming times for the 100yard backstroke.

Swimmer 2 3 4 5 6 7 8 9 Before 75 76 67 72 73 66 63 72 69 71 74 65 68 72 70 60 67 65 Afler 71 74 65 6 72 70 60 57

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