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Biotechnology. A biotechnology firm in Boston is planning its investment strategy for future products and research labs. A poll found that only 8% of a random sample of 1012 U.S. adults approved of attempts to clone a human.
a) Find the margin of error for this poll if we want 95% confidence in our estimate of the percent of American adults who approve of cloning humans.
b) Explain what that margin of error means.
c) If we only need to be 90% confident, will the margin of error be larger or smaller? Explain.
d) Find that margin of error.
e) In general, if all other aspects of the situation remain the same, would smaller samples produce smaller or larger margins of error?
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Suppose that a survey is being planned for purposes of estimating the average number of hours spent exercising daily by adults (18 years of age or older) living in a certain community.
Three families, each with three members, are lined up at random for a picture. What is the probability that members of each family happen to be together (that is, not separated by someone from another family) in the picture?
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1) We are 99% confident that the proportion of patients surveyed that have experienced a reduction in symptoms is between 0.2112 and 0.6638. 2) We are certain that 99% of patients will be between 0.2112 and 0.6638. 3) We cannot determine the proper..
1.bags of chips are filled using a machine. because not all chips are the same size it is impossible to get the exact
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