Mathematics, 18.05.2021 18:50 therealpr1metime45

The average time for 100-meter race that Usain Bolt used is 9.6 seconds on average. He wants to test whether his speed has decreased or not. His speed was tested for 16 times, and the average time is 9.7 seconds. Assume the population standard deviation is 0.1 second. At a 5% significance level, the decision is to .

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The average time for 100-meter race that Usain Bolt used is 9.6 seconds on average. He wants to test...