Reference no: EM13156498
A random sample of 10 miniature Tootsie Rolls was taken from a bag. Each piece was weighed on a very accurate scale. The results in grams were 3.087 3.131 3.241 3.241 3.270 3.353 3.400 3.411 3.437 3.477
(a) Construct a 90 percent confidence interval for the true mean weight. (b) What sample size
would be necessary to estimate the true weight with an error of ± 0.03 grams with 90 percent confidence?
(c) Discuss the factors which might cause variation in the weight of Tootsie Rolls during
manufacture. (Data are from a project by MBA student Henry Scussel.) Tootsie
In 1992, the FAA conducted 86,991 pre-employment drug tests on job applicants who were to be engaged in safety and security-related jobs, and found that 1,143 were positive. (a) Construct a 95 percent confidence interval for the population proportion of positive drug tests.
(b) Why is the normality assumption not a problem, despite the very small value of p?
State the main points of the Central Limit Theorem for a mean.
Why is population shape of concern when estimating a mean? What does sample size have to do with it?
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Explain main points of central limit theorem for a mean
: State the main points of the Central Limit Theorem for a mean. Why is population shape of concern when estimating a mean? What does sample size have to do with it?
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What happens to the stock of money if fed lowers reserve
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What fraction of the heterozygosity at an arbitrary neutral
: A flock of 10 random finches from a large population group flies to an island and there founds another large population as follows: In the first 5 generations, the population size remains 10. After this, the population size grows to a very large s..
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What is the rate of formation of aluminum
: The electrolysis of molten Al2O3 at 980 ºC is used to produce metallic aluminum. A current of 360 A is used in the electrolysis cell. What is the rate of formation of aluminum, in kilograms per hour?
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