Mathematics, 05.05.2020 04:23 psychocatgirl1
An automobile manufacturer claims that its van has a 36.9 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this van since it is believed that the van has an incorrect manufacturer's MPG rating. After testing 240 vans, they found a mean MPG of 37.3. Assume the standard deviation is known to be 2.2. A level of significance of 0.01 will be used. Find the value of the test statistic.
Answers: 3
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Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.
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An automobile manufacturer claims that its van has a 36.9 miles/gallon (MPG) rating. An independent...
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