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A ponderosa pine forest in Colorado has a pine beetle infestation. The beetles bore into a tree and carry a fungus which ultimately kills the tree. Let p be the proportion of trees in the forest that are infested.
A) If no preliminary sample is taken to estimate p, how large a sample is necessary to be 90% sure that a point estimate will be within a distance of .06 from p?
B)A preliminary study of 58 trees showed that 19 were infested. How many more trees should be included in the sample to be sure 90% that a point estimate will be within a distance of .05 from p?
the poisson distribution can be a reasonable approximation of the binomial distribution. explain why this maymay not be
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Two boats the prada (Italy) and the oracle (USA) are competing for a spot in the upcoming Americans cup race. They race over a part of the course several times. Below are the sample times in minutes at the .05 significance level.
Develop a trend line for the demand for fertilizer using computer software. Data collected on the yearly demand for 50 pound bags of fertilizer at Wallace Garden Supply are shown in the following table:
a machine that produces a major part for an airplane engine is monitored closely. in the past 10 of the parts produced
A retail store manager is trying to estimate the average purchase transaction amount for a particular store. She takes a sample of 35 transactions and determines the mean purchase transaction amount from this same is $85 with a standard deviation ..
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A State University uses thousands of fluorescent light bulbs each year. The brand of bulb it currently uses has a mean life of 900 hours. A manufacturer claims that its new brands of bulbs
Find out sample correlation coefficients of (I) age with dry weight, and (2) age with log 10 dry weight. Interpret your results.
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