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A medical test for malaria is subject to some error. Given a person who has malaria, the probability that the test will fail to reveal the malaria is 0.06. Given a person who does not have malaria, the test will correctly identify that the person does not have malaria with probability 0.91. In a particular area, 20% of the population suffers from malaria.
A. If someone has malaria, what is the probability that the test will identify that person as having malaria?
B. Copy the following joint probability table to your answer papers and fill it in.
Of 900 consumers surveyed, 414 said they were very enthusiastic about a new home decor scheme. What is the 99% confidence interval for the population proportion?
How can standardized z-scores be used to compare people across different contexts, such as the batting averages of two players -one who played in the 1970s and one who played in the 1990s?
A random sample of 8 recent batches produced the following yields. Conduct a hypothesis test to determine whether the true mean yield has decreased. Use an a=0.01
The sample data are summarized by the statistics n = 27, x = 4.6 years, s- 1.9 years.
What is the role of probability concepts in business decision making? Define probability concepts.
Calculate the "t" value for independent groups for the following data using the formula presented in the module. Check the accuracy of your calculations.
At 95% confidence using the p- value approach, test the hypotheses. Let α = 0.1.
Thirty-six percent of women consider themselves basketball fans. You randomly select six women and ask each if she considers herself a basketball fan. a) construct a binomial distribution.
Calculate the difference in the average clutter between network and cable television and which standard deviation would lead you to conclude that there was a major difference in the two clutter averages? Comment.
The liquid chlorine added to swimming pools to combat algae has a relatively short shelf life before it loses its effectiveness. Records indicate that the mean shelf life of a 5-gallon jug of chlorine is 2,10 hours (90 days).
The instructor wanted to "pass" anyone who scored above 69. What proportion of exams will have passing scores?
In textile industry, a manufacturer is interested in the number of blemishes or flaws occurring in each 100 feet of material. Of the following probability distributions, the one that most applies to this situation is the.
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