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Suppose that the life in hours of a electronic tube manufactured by a certain process is normally distributed with parameters m = 160 hours and σ. What is the maximum allowable value for σ, if the life X of a tube is to have probability 0.80 of being between 120 and 200 hours?
A psychologist has recently developed a test to measure the emotional intelligence of people. Based on the results of the pretest that sampled over hundreds of participants, the psychologist learned that the mean is 97 and the standard deviation i..
Using the 0.10 level of significance, is it possible that the superior performance of the new brochure was just due to chance and that the new brochure might really be no better than the old one?
A thin circular sheet of aluminum has a radius of 20 cm and a thickness of 0.5mm. Find the mass of the sheet.
You now conduct a series of experiments with electro-migration at the same 2 temperatures (T1 = 25ο C and T2= 60ο C). The current density at T1 was 2 mA/μm2 and the current density at T2 was 1 mA/μm2.
Considering that the probability of event C is .44, of event D is .20, and the probability of their intersection is .088, determine whether C and D are dependent or independent events.
Using the appropriate commands in Excel, find the value of the test statistic. Assume that σ2A = 4.4 and σ2B = 5.2 . What is the p-value
consider a random sample of size n from a poisson distribution xi poim.a find the crlb for the variances of
SAT scores of students at an Ivy League college are distributed with a standard deviation of 250 points. Two statistics students, Raina and Luke, want to estimate the average SAT score of students at this college as part of a class project. They w..
Is there any evidence to suggest that the true proportion of Canadians who rate their tech savviness as B or better is greater in Edmonton than in Thunder Bay? Use a = 0.01.
Which cities tend to receive higher rankings-those north of the equator or those south of the equator?- Did the top ten cities tend to change their rankings since the previous study?
use this information to answer the next two questions. a researcher at a major hospital wishes to estimate the
A volunteer blood donor walks into a Red Cross Blood office. What is the probability she will be Asian and have Type O blood? What is the probability that a white donor will not have Type A blood?
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