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A political scientist obtained recordings of election-night acceptance speeches of seven newly elected representatives to the US Congress. She counted the number of minutes devoted to urban problems in these speeches. Four of the representatives were from rural districts and three were from urban districts. Listed below are the numbers of minutes devoted to urban problems by each representative based on where they were from. Do these data suggest that the amount of time devoted to urban problems in acceptance speeches of newly elected representatives to the U.S. Congress differ according to whether they come from rural or urban districts? (Use the .05 level)
Half of the 1000 emloyees were involved in some type of exercise. What is the probability that an employee will have a cold next year?
Evaluate the mean, the median, and the mode of the salaries. Which best describes a typical salary and Evaluate the range, variance, and standard deviation of the data set. Interpret the results in the context of the real-life setting.
Failure times for a randomly failing component are 3.3, 14.3, 27.1, 41.3, and 92.2 hours. Find the MTTF and standard deviation using: a) moment estimation. b) maximum likelihood estimation.
The National Turkey Association wants to experiment with three different feed mixtures for very young turkeys. Since no experience exists regarding the three mixtures, no assumptions can be made about the distribution of weights.
Subcontracting can handle a maximum of 10 units per month. Beginning inventory is zero. Develop a plan that minimizes total cost. No back orders are allowed.
Find the probability that in a given year a) exactly one major hurricane will strike the U.S. mainland, b) at most one major hurricane will strike the U.S. mainland.
A new process for producing synthetic diamonds can be operated at a profitable level only if the average weight of the diamonds produced by the process is greater than 0.5 karat.
For a candidate who guesses at all answers, find the mean and variance for the random variable X, the number of correct answers.
A random variable has a standard deviation of 16, and an unknown mean. Find the lowest size of a simple random sample so that the sample mean estimates the population mean with a standard error no larger than 0.25.
USA Today conducted a survey asking readers, "What is the most hilarious thing that has ever happened to you en route to or during a business trip?" a. What kind of sampling method is this?
What happens to the Maximum Error of Estimate as the sample size gets larger?
A biologist estimates that 40% of deer in the region carry a certain type of tick. For a sample of 300 deer selectetd at random, what is the chance that 124 or fewer deer have this tick?
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