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Suppose that the incident rate of a particulat kind of accient is 1/10,000 persons. In a town of 50,000 persons, what is the probability that there is no accident of this kind?
Using α = .05 test for significance differences among the population mean wasted time for theses three urban areas. What is the p-value? What is your conclusion?
In a study designed to test the effectiveness of acupuncture for treating migraine, 142 subjects were treated with acupuncture and 80 subjects were given a sham treatment. The numbers of migraine attacks for the acupuncture treatment group had a m..
How do question content and wording, response strategy, and preliminary analysis planning affect question construction?
Penultimate Support Systems makes fairly good speaker and equipment support stands for music groups. The assembly process involves two operations
Let (X,Y) have uniform distribution on the four points (-1,0), (0,1), (0,-1), (1,0). Show that X and Y are uncorrelated but not independent.
The times for 300 college students of introductory statistics to complete a one-hour times exam.
A random sample of 16 ages is drawn from the population, and we find the sample mean of these observations to be μ = 8.76. What is the value of the test statistic?
To evaluate average annual expenses of students on books and class materials sample size 36 is taken.
Find the z score corresponding to a score of X = 60 for each of the following distributions:
A class has 13 women and 18 men. If student if selected randomly, determine the probability student is a woman?
A normal population has a mean of 75 and a standard deviation of 5. You select a sample of 40. Compute the probability that the sample mean is Between 74 and 76.
Explain the difference between one-factor and two-factor ANOVA. (b) Write the linear model form of one-factor ANOVA. (c) State the hypotheses for a one-factor ANOVA in two different ways.
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