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Walleye is a common game fish. Adult walleye have a length with a mean of 44 cm and a standard deviation of 4 cm and the distribution of lengths is approximately Normal. What fraction of walleye are between 40 and 48 cm in length?
A test on zoology is to be given next week. Suppose 75 percent of the students study for the test and 25 percent do not. If a student studies for the exam, the probability that he or she will pass is 0.90. If the student does not study, the pro..
Find a 99% confidence interval for the population mean number of weekly miles.
It has been claimed that women live longer than men; however, men tend to be older than their wives. Ages of sixteen husbands and wives from England were obtained. These data should be analyzed with a
What percentage of items will weigh between 6.4 and 8.9 ounces?
Decision making under risk is the same as decision making under uncertainty because in both the probabilities are unknown.
Probability using Z-score.Find the probabilities that a random variable Z having a standard normal distribution will take on a value.
The main part of the ACS contacts 250,000 addresses by mail each month, with follow-up by phone and in person if there is no response. Each household answers questions about their housing, economic, and social status. What is the Population.
Conclude the finite population, correction factor.With the population size of 1,000 and a planned sample size of 200, what is the finite population, correction.
In 2010, the average age of students at UTC was 22 with a standard deviation of 3.96. In 2013, the average age was 24 with a standard deviation of 4.08. In which year do the ages show a more dispersed distribution? Show your complete work and supp..
At the 10% level of significance, is there sufficient evidence to indicate that more books are being loaned out per day, on the average?
The mean salary of the nine employees of a small business is $52,000 per year. One employee, whose salary was $68,000, was red. Two new employees, who will each be paid a salary of $40,000, are hired. What is the new mean annual salary of the emp..
If many samples of size 1000 persons are chosen, determine the expected value (mean X-bar) or average of average IQ's for these samples?
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