Mathematics, 02.12.2020 16:20 jeanieb
A tire manufacturer advertises that their brand of radial tires has a mean life of 40,000 miles with a population standard deviation of 1,500 miles. A consumer research team decides to investigate this claim after receiving several complaints from people who believe the advertisement is false and that the mean life of 40,000 miles is too high. The research team tests 100 of these radial tires and obtains a sample mean tire life of 39,750 miles. Is the advertisement legitimate
Answers: 1
Mathematics, 21.06.2019 18:00, kezin
The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?
Answers: 1
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