Zdravko Popovich,the mid-distance running coach for the Olympic team of an eastern European country,claims that his six-month training program significantly reduces the average time to complete a 1500-meter run.Five mid-distance runners were randomly selected.Their times (in minutes)for the 1500-meter run were recorded before and after six months of training under coach Popovich.The results are given below. At an alpha level of .05,can we conclude that there has been a significant decrease in the mean time?

Question

Zdravko Popovich,the mid-distance running coach for the Olympic team of an eastern European country,claims that his six-month training program significantly reduces the average time to complete a 1500-meter run.Five mid-distance runners were randomly selected.Their times (in minutes)for the 1500-meter run were recorded before and after six months of training under coach Popovich.The results are given below.

At an alpha level of .05,can we conclude that there has been a significant decrease in the mean time?

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The Answer of Zdravko Popovich,the mid-distance running coach for the Olympic team of an eastern European country,claims that his six-month training program significantly reduces the average time to complete a 1500-meter run.Five mid-distance runners were randomly selected.Their times (in minutes)for the 1500-meter run were recorded before and after six months of training under coach Popovich.The results are given below.  At an alpha level of .05,can we conclude that there has been a significant decrease in the mean time?

Zdravko Popovich,the Mid-Distance Running Coach for the Olympic Team of an Eastern