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The binomial distribution approaches normality as N increases. Explain how this relationship is useful for solving binomial problems involving N > 20. What are the advantages and disadvantages of this approach?
Thirty percent of the population in a southwestern community are Spanish-speaking Americans. A Spanish-speaking person is accused of killing a non-Spanish speaking American.
The random variable xi represents the number of complaints, and p(xi) is the probability of receiving xi complaints.
Test to determine whether the correlation in the population is zero, versus the alternate hypothesis that the correlation is greater than zero. Use the 0.05 significance level.
lowering the price does not decrease this behavior and we should not decide to lower prices based on this research." Comment on the executive's conclusion. What type of inference is being made? Will the decision not to lower prices be a good one.
Which of the following assumptions for inference about a proportion using a confidence interval are violated,
Find the value of W, the test statistic for a two sample rank-sum test that would compare the two methods for losing weight. Give the details of how you found W. Please show your step-by-step hand calculation here.
Mr. James McWhinney, president of Daniel-James Financial Services, believes there is a relationship between the number of client contacts and the dollar amount of sales.
Can you think of an example where regression analysis can be used? How is regression analysis being used in a retail environment, or how should it be used?
Calculate the probability of a type ii error for the following hypotheses when µ = 37:
The first unit produced after the calibration effort to be found to be defective. What is the probability that machine is in adjustment?
There is sufficient evidence to support the claim that the mean speed of all cars on that section of I-10 is greater than the posted speed limit of 70 mph.
A side effect of a certain anesthetic used in surgery is the hiccups, which occurs in about 10 percent of the cases. If three patients are scheduled for surgery today and are to be administered this anesthetic, compute the probability that
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