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Suppose that the number of in cream cones eaten in a year by Americans is normally distributed and the mean number of ice cream cones Americans eat is 50 a year. Suppose that a researcher takes 1,000,000 samples of Americans, and each sample consists of 5 Americans. She asks each American how many ice cream cones they eat. She then calculates a mean for each of the 1,000,000 samples. If she added up the mean for each sample, and divided by 1,000,000, what would she get? Explain why.
A mean of 45 months and a standard deviation of 8 months. if a random sample of 600 batteries is selected, how many batteries would weigh last more than 48 months?
The sum of the squares error measures the variability in the measurements within the groups. Equal replication means that the same number of objects being observed are randomly selected from each population.
Three families, each with three members, are lined up at random for a picture. What is the probability that members of each family happen to be together (that is, not separated by someone from another family) in the picture?
An n-dimensional Gaussian vector W has a block diagonal covariance matrix where CX is m × m, CY is (n - m) × (n - m). Show that W can be written in terms of component vectors X and Y in the form such that X and Y are independent Gaussian random ve..
A researcher is studying IQ levels. From past experience she knows the population mean IQ for adults is 110 and the standard deviation is 15.
The lifetime of a certain machine is a random variable having an exponential distribution with parameter λ. When the machine breaks down, there is a probability equal to p (respectively, 1 - p) that the failure is of type I (resp., II).
The following data represent the cost of electricity for the period of July 2008 for a random sample of 50 one-bedroom apartments in a large city.
1. Discuss the context in which can be analyzed by using a random-effects model. 2. What are the reasons for conducting a two-way analysis rather than two sep- arate one-way ANOVAs? Explain.
the claim is that the proportion of peas with yellow pods is equal to 0.25 or 25. the sample statistics from one
What to do : Write a memo to your instructor describing the audience of decision makers (primary) and others (secondary) for your Instruction Manual. Identify your primary audience and secondary audience, if any. For each audience, describe the fo..
Assuming that the manufacturer's claim is correct, what is the probability the mean of the sample is 37,650 miles or less?
Number of avalanche fatalities The numbers of avalanche fatalities for the last nine seasons were reported as 1,1,1,5,5,5,5,8,10. Roughly what type of distribution is this? a. normal
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