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At cruising altitude, a commercial jet engine consumes an average of 850 gallons of fuel per hour with a standard deviation of 48 gallons per hour. Assuming that the fuel consumption follows a normal distribution at cruising altitude, find the probability that the hourly fuel consumption is:
(a) Between 700 and 950 gallons,
(b) Less than 750 gallons,
(c) More than 1000 gallons.
Can you explain to me how the null and alternative hypothesis for one-sample testing differs from two-sample testing; and explain how these two hypothesis' are the same. Please provide a numerical example:
Find the expected value of the number of tests taken.
1 does correlation equal causation? does the strength of correlation depend on the direction of the relationship? what
A manufacturing process makes items whose weights are normally distributed. It is known that 22.57% of all the items made weigh between 100 grams up to mean and 49.18% weigh from the mean up to 190 grams. Find out the standard deviation.
Given the following data on Asian and European Share of U.S. Light Truck Sales(1990-2003): Plot the market-share data. (b) Describe the trend (if any) and discuss possible causes. (c) Fit three trends (linear, exponential, quadratic).
Although there is a popular belief that herbal remedies such as ginkgo biloba and ginseng may improve learning and memory in healthy adults, these effects are usually not supported by well-controlled research.
A laboratory scale is known to have a standard deviation of = 0.001 gram in repeated weighings. Scale readings in repeated weighings are normally distributed, with mean equal to the true weight of the specimen.
question 1using the telephone numbers listed in your local directory as your population randomly obtain 20 samples of
q1. of all 3 - 5 year old children 71 are enrolled in school. if a sample of 400 children are randomly selected what is
in a gallop poll of 1005 randomly selected americans in april 2006 482 responded yes to the question do you consider
Write a brief statement of purpose of the study. Define the population. State the hypotheses for the study. Select an a value
Describe what do you mean by terms 'false positive" and " false negative".
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