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Pesticide concentrations in sediment from irrigation areas can provide information required to assess exposure and fate of these chemicals in freshwater ecosystems and their likely impacts to the marine environment. In a study (Jochen F. Muller et al., "Pesticides in sedi- ments from Queensland Irrigation channels and drains," Marine Pollution Bulletin 41(7-12), 294-301, 2000), 103 sediment samples were collected from irrigation channels and drains in 11 agricultural areas of Queensland. In 74 of these samples, they detected DDTs with concentration levels up to 840 ng g-1 dw. Obtain a 95% con?dence interval for the proportion of total number of sediments with detectable DDTs.
lakewood fashions must decide how many lots of assorted ski wear to order for its 3 stores. Information on pricing, sales and inventory costs has led to the following payoff
An insurance company, based on past experience, estimates the mean damage for a natural disaster in its area is $5,000. After introducing several plans to prevent loss
Henry performed a two-tailed test for an experiment in which N = 24. He could not find his table of t critical values, but he remembered the tcv at df = 13. He decided to co
If the population mean for how much alumni spend is $115.50 per week eating out socially, what is the mean and standard deviation for the sampling distribution of x?
If there is an outage, there is a .05 probability that the resulting losses will be very large, approximately $ 80 million in lost earnings. Also, it is estimated that there
Head circumferences of adult males have a bell-shaped distribution with a mean of 56 cm and a standard deviation of 2 cm.- Explain whether or not it would be unusual for an ad
The medical school at a university, if 10 medical students are randomly selected for that school. find the probability that only 4 of them will graduate.
(a) What is the probability a randomly chosen person in this group requested at least one of these two features? (b) What proportion of the people in this group requested neit
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