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Question: Biology and Environmental Science Ships dumping garbage and ordinary beachgoers contribute to the increasing amount of trash that washes onto the shore and collects in the oceans all over the world. In 2012 the International Coastal Cleanup collected more than 9 million pounds of garbage from the world's oceans. Common debris items collected included food wrappers, bottle caps, and beverage bottles. For the United States, cigarettes accounted for 28.1% of all debris items.26 A random sample of 430 debris items from a clean-up along a Texas beach was obtained.
a. Find the probability that the proportion of cigarette debris items is greater than 0.31.
b. Find the probability that the proportion of cigarette debris items is between 0.25 and 0.30.
c. Suppose 94 of the debris items are cigarettes. Is there any evidence to suggest that the true proportion of cigarette debris items is different from 0.281? Justify your answer.
Understanding the tests of significance. Using a new software package, you ran a multiple regression.- Does this mean that there is something wrong with the software? Explain your answer.
VOTER TURNOUT BY PROFESSION The following table gives the percent of eligible voters grouped according to profession who responded with "voted" in the 2000.
Let a, b, and c be the vertices of an equilateral triangle of side 1. Let α := (δa + δb )/2,β = (δa + δc )/2, and γ = (δb + δc )/2. (So the simultaneous attainment of Monge-Wasserstein distances by random variables for all laws, as in R1 in Proble..
What is the degree of correlation between the dependent variable and the independent variable? Is the statistical significance of the model as a whole less than the desired statistical significance for the regression model? Explain the basis for yo..
Using a 95% confidence interval, estimate the minimum difference between the mean postexposure attitude score and the mean preexposure attitude score. (Round your answer to 2 decimal places.).
Develop a probability distribution for the number of travelers who plan their trips within two weeks of departure.
Manufacturer of guitar amplifiers markets one of its models, Vagabond, at a power rating of 45 watts. GuitarGod magazine suspects that this rating is inaccurate for this year's model of the amp. In a random sample of 32 units of this year's version o..
A researcher conductued a study of the access speed of 35 hard drives and concluded that his maximum error of estimate was 35. If he were to conduct a second study to reduce the maximum error of estimate to 7, about how many hard drives should he ..
Phil Green, the CEO of Emblem Hotels, was wondering how to differentiate among three different types of accommodations offered under the Emblem flag in order to attract the appropriate type of client for each.
If the sample standard deviation is s=10, are the data sufficient to conclude that the treatment has a significant effect using a two-tailed test with a critical value of .05?
in a typical sports playoff series two teams play a sequence of games until one team the eventual winner has won four
40 of unf students are male. suppose you decide to randomly select 15 unf students and observe if they are male or
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