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A survey dating back to the 1990's suggested that Americans anticipated a reduction in living standards and that a steadily increasing consumption no longer might be as important as it was in the past. (Were they right?)
Suppose that a poll of 2000 people indicated 1373 in favor of forcing a reduction in the size of American automobiles by legislative means.
Would you expect to observe as many as 1373 in favor of this proposition if, in fact, the general public was split 50-50 on the issue?
Justify your answer.
What does null hypothesis for repeated-measures hypothesis test state?
A random sample of 85 group leaders and supervisors revealed that they worked an average of 6.5 years before being promoted. The population standard deviation was 1.7 years. Using the 0.95 degree of confidence, what is the confidence interval for ..
How would you find normal approximation to the binomial probability in part a? please show how you would calculate mean and standard deviation in form for normal approximation to the binomial and show the final form you would use w/o going through..
Suppose that you're the Quality Manager for the Emerson D. Meritz Machine Tool Company. Your model IE566 grinding machine is afflicted by three types of defects classified as major (type A), serious (type B) and minor (type C).
Suppose that a certain college class contains 54 students. Of these, 34 are sophomores, 35 are psychology majors, and 7 are neither. A student is selected at random from the class.
Find the z score corresponding to a score of X = 60 for each of the following distributions:
If the company's report is correct, what is the probability that the average balance of an account in the sample is $383 or less?
Susan Williams has been the production manager of Medical Suppliers, Inc., for the past 17 years. Medical Suppliers, Inc., is a producer of bandages and arm slings.
Can we conclude from this that most workers there earn between $25 and $35 per hour? Is this the right interpretation for the margin of error?
What are the null and alternative hypotheses for this test? Use ANOVA and the 0.05 level of significance in testing the null hypothesis identified in part (a).
A communication network transmits binary digits, 0 to 1, where each digit is transmitted 10 times in succession. During each transmission, there is a 0.995 probability of accurate transmission.
Dr. H wants to conduct a statistical test that will show her new medication to be effective in decreasing violence in criminals. What is the null hypothesis? What is the alternate hypothesis?
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