Mathematics, 10.01.2020 06:31 dlr1628
Aresearcher compares two compounds (1 and 2) used in the manufacture of car tires that are designed to reduce braking distances for suvs equipped with the tires. suvs equipped with tires using compound 1 have a mean braking distance of 62 feet and a standard deviation of 10.5 feet. suvs equipped with tires using compound 2 have a mean braking distance of 66 feet and a standard deviation of 12.0 feet. suppose that a sample of 86 braking tests are performed for each compound. using these results, test the claim that the braking distance for suvs equipped with tires using compound 1 is shorter than the braking distance when compound 2 is used. let î¼1 be the true mean braking distance corresponding to compound 1 and î¼2 be the true mean braking distance corresponding to compound 2. use the 0.05 level of significance.
Answers: 3
Mathematics, 22.06.2019 01:50, Savageman9509
The length of time it takes to find a parking space at 9 a. m. follows a normal distribution with a mean of 5 minutes and a standard deviation of 2 minutes. find the probability that it takes at least 8 minutes to find a parking space. (round your answer to four decimal places.)
Answers: 1
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