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A transect is an archaeological study area that is mile wide and 1 mile long. A site in a transect is the location of a significant archaeological find. Let x represent the number of sites per transect. In a section of Chaco Canyon, a large number of transects showed that x has a population variance . In a different section of Chaco Canyon, a random sample of 23 transects gave a sample variance for the number of sites per transect. Use an to test the claim that the variance in the new section is greater than 39.1.
State the null and alternate hypotheses.
suppose a point xy is chosen at random from the disk x2 y2 lt 1. find a the marginal density of x and b the
X is a random variable with a mean of 64 and a standard deviation of eight. Write the distribution for the sample mean of samples of size 225 drawn
It has been identified that a binomial distribution fits the delivery commitment of Amazon orders "3 days or less" and this is met 95% of the time.
In a certain city, there are 100,000 persons age 18 to 24. A simple random sample of 500 such persons is drawn, of whom 198 turn out to be currently enrolled in college.
Perry et al. (1999) wanted to test the folklore that women who have not been given information about the sex of their unborn child can guess.
Moving until all the nodes 1,2,......,m have been visited at least once. Starting at node 0, find the probability that node i is the last node visited, i=1,.....m.
What is the process through which we can calculate a line that goes through a scatter plot with a linear pattern?
environmentalists are concerned about emissions of sulfur dioxide into the air. the average number of days per year in
Determine the mean and the standard deviation of the following frequency distribution. (Round your answers to 2 decimal places.)
Test whether the distribution of millionaires in 2011 is different from the distribution in 2003 at a = 0.05.
If 5 officers are randomly selected for service during the speech, what is the probability that exactly 2 of them will have had advanced training in crowd control?
X1,..., Xn is an iid sequence of exponential random variables, each with expected value 5. (a) What is Var[M9(X)], the variance of the sample mean based on nine trials?
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