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As part of a study to determine factors that may explain differences in animal species relative to their size, the following body masses (in grams) of 50 different bird species were reported in the paper "Temperature and the northern distribution of wintering birds" by Richard Repasky. Ecology: 72(6), 1991: pp 2274-2285. © by the Ecology Society of America.
Does the distribution of the body masses appear to follow a normal distribution? Provide both a graphical and quantitative assessment.
At the 0.005 level, evaluate the effectiveness of the new ball in increasing distance. Using the appropriate statistical table, what is the approximate p-value for this test?
The executives need to know the percentage of people in the market area that are senior citizens. Name the basic category of statistical procedure they would use to determine this information.
discuss the importance of identifying an appropriate distribution of the quality characteristic in process capability
Check that the formula (1) holds when X Unif(0, b). Formula (1) also works for b = 1. Check this when X is an Exponential RV with PDF f(x) = e-x for x 0.
a sample of 352 subscribers to wired magazine shows the mean time spent using the internet is 13.4 hours per week with
wall street securities firms paid out record year-end bonuses of 125500 per employee for 2005 fortune february 6 2006.
the metal body for a spark plug is made by a combination of cold extrusion and machining. the occurrence of surface
Five have a 3/10,000 chance for failure. Four have a 4/10,000 chance for failure. One componet has a 1/100 chance for failur. What is the overall reliability of the product?
In order to estimate the proportion of families who prefer female baby-sitters to male baby-sitters with an error of at most 8 percentage points and with at least 95 percent confidence, how large a sample should be taken?
A certain airplane has two alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is.02.
a manufacturer of window frames knows from experince that 1 percent of the production will have some type of minor
It is generally believed that electrical problems affect about 14% of new cars. An automobile mechanic conducts diagnostic tests on 128 new cars on the lot. What is the standard deviation for the sample proportion?
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