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1. An alien empire is considering taking over planet Earth, but they will only do so if the portion of rebellious humans is less than 10%. They abducted a random sample of 400 humans, performed special psychological tests, and found that 14% of the sample are rebellious. Perform a hypothesis test at a significance level of , to test the claim that more than 10% of humans are rebellious.
2. Suppose we measured the IQ scores of the 42 students in NURS561, and calculated a mean IQ score of 108.2, and a standard deviation of 6.27. If we make no assumptions about the population mean and standard deviation of IQ scores, test the hypothesis that students in NURS561 have a mean IQ greater than 100. Use a significance level of.
A metropolitan school system consists of three school districts-norths, south, central. The north district contains 25% of all students, the south district contains 40%, and the central district contains 35%.
As it is a 2 × 2 table, try also two-tailed two-sample z test for π 1 = π 2 and verify that z 2 is same as your chi-square statistic. Which test do you prefer? Explain why?
Using the manufacturer database, construct a frequency distribution for the variable Number of Production Workers. What does the frequency distribution reveal.
Suppose that you draw a random sample of 27 cans. Find the probability that the mean weight of the sample is less than 6.19 ounces.
A researcher is curious whether or not a person's level of education influences his or her personal outcome. Identify the most logical (i) response
Playground. Some people have been complaining that the children's playground at a municipal park is too small and is in need of repair.
the piron software company currently develops marketing software for primarily service-based organizations. recently
A retailer that sells home entertainment systems accumulated 10451 sales invoices during the previous year. The total of the sales amount on these invoices as claimed by the company is Rs.63,84,675
in a binomial experiment the probability of success is 0.06. what is the probability of at most two successes in seven
In your own words, define epistemology and ontology. Why are these concepts important to the study of research? How might the concepts influence your future research?
A minor league baseball executive has become concerned about the slow pace of games played in her league, fearing that it will lower attendance.
For each of the following populations, would a score of X =50 be considered a central score (near the middle of the distribution) or an extreme score (far out in the tail of the distribution)?
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