Coach Z, the Mid-Distance Running Coach for the Olympic Team

question 43

Short Answer

Coach Z, 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 Z. The results are given below.
Construct the appropriate 95 percent confidence interval when we want to test whether there is a difference (s_d = .228).

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Support provided, usually to developing countries or firms, in the form of expertise or knowledge transfer to foster growth or solve specific problems.

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The provision of small loans and other financial services to low-income entrepreneurs and small-business owners in developing countries.

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