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Bjork Larsen was trying to decide whether to use a new racing wax for cross-country skis. He decided that the wax would be worth the
Bjork Larsen was trying to decide whether to use a new racing wax for cross-country skis. He decided that the wax would be worth the price if he could average less than 55 seconds on a course he knew well, so he planned to study the wax by racing on the course 8 times. His 8 race times were 59.2, 64.2, 47.9, 53.7, 45.2, 48.3, 50.9, and 43.4 g seconds. Should he buy the wax? Explain by performing an appropriate hypothesis test. Assume the assumptions and conditions for appropriate hypothesis testing are met for the sample. Use 0.05 as the P-value cutoff level. on 2 ion 3 Choose the correct null and alternative hypotheses below. A. Ho:1<55 ha: h= 55 . ho: p hap<55 c.> 55 HA: H = 55 D. Ho:1=55 HA: H > 55 Calculate the test statistic. t= (Round to three decimal places as needed.)
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