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An automobile manufacturer claims that its van has a 26.3 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 250 vans, they found a mean MPG of 26.7. Assume the variance is known to be 6.76. A level of significance of 0.1 will be used. Find the value of the test statistic. Round your answer to 2 decimal places.
Enter the value of the test statistic.
A drawer of socks contains seven black socks, eight blue socks, and nine green socks. Two socks are chosen in the dark.
A random sample of 100 computers showed a mean of 115 gigabytes used with a standard deviation of 20 gigabytes. What is the standard error of the mean?
a random sample of 200 college students taken by this researcher showed that these adults spend an average of 13.75
according to the ameriprise financial money across generations study 9 out of 10 parents with adult children ages 20
The probability that it is a camper with Canadian license plates is 0.09. What is the probability that a camper entering the Luray Caverns has Canadian license plates?
What is the firm's weight average cost of capital (WACC) if it has to issue new common stock? Round your answer to 3 decimal places.
You are given two boxes: one of them containing 900 red marbles and 100 blue marbles, the other one contains 500 red marbles and 500 blue marbles. If we pick one of the boxes randomly. and pick a marble what is the probability that it is blue? If we ..
Ed and Adelaide attend the same high school, but are in different math classes. The time E that it takes Ed to do his math homework follows a Normal.
An automobile accidents occur over a 72 hour holiday period are like events in a poisson process with = 10 per hour. Let Y be the time for the first accident.
A car dealership has 8 ?red, 14 ?silver, and 5 black cars on the lot. Ten cars are randomly chosen to be displayed in front of the dealership.
How do you find the intersection of the 2 events when calculating conditional probability?
Find the critical value Zsigma/2 that corresponds to a 99% confidence level.?
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