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Fishing Northern Pike. Athabasca Fishing Lodge is located on Lake Athabasca in northern Canada. In one of its recent brochures, the lodge advertises that 75% of its guests catch northern pike over 20 pounds. Suppose that last summer 64 out of a random sample of 83 guests did, in fact catch northern pike weighing over 20 pounds. Does this indicate that the population proportion of guests who catch pike over 20 pounds is different from 75% (either higher or lower)? Use = 0.05.
Below are revenue and profit (both in $ billions) for nine large entertainment companies.
A confidence interval estimate for the population mean is given to be (41.16, 49.85). If the standard deviation is 16.290 and the sample size is 54, answer each of the following (show all work):
Consumer Review posts reviews and ratings of a variety of products on internet. The following is a sample of 20 speaker systems and their ratings (www.audioreviews.com).
What is the probability that the police will strike and the firefighters will not? What is the probability that the firefighters will strike and the police will not?
Generate a 95% confidence interval for the true mean total cholesterol levels in children.
Develop a 95% confidence interval for the mean amount of household income for sub- scribers to Young Professional magazine. Interpret this interval.
Concept of statistical signi cance
What are planned comparisons? Why do researchers making planned comparisons need to make the Bonferroni correction? If a researcher is making four planned comparisons using the .05 significance level
Twelve cases of leukemia are reported in people living in a particular census tract over a 5-year period. Is this number of cases abnormal if only 6.7 cases would be expected based on national cancer-incidence rates?
The Queen Mary sails between England and the U.S. Stowaways are sometimes found on board. The ages (years) of stowaways from eastbound and westbound crossings are given below. Eastbound: 24, 24, 34, 15, 19, 22, 18, 20, 20, 17 Westbound: 41, 24, 32..
A Private firm reports that 8% of the 2 million small businesses who apply for loan each year receive special interest rate (usually higher than market rate) because of high riskiness associated with small business.
Are stock splits beneficial to stockholders? SNL Securities studied stock splits in the banking industry over an 18-month period and found that stock splits tended to increase the value of an individual stock holding.
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