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430 randomly selected light bulbs were tested in a laboratory, 224 lasted more than 500 hours. Find a point estimate of the proportion of all light bulbs that last more than 500 hours.
List 1 profession example for each probability type: empirical probability and theoretical (classical) probability. Explain clearly how these probabilities are used.
Pulse rate is an important measure of the fitness of a person's cardiovascular system. The mean pulse rate for all U.S. adult males is approximately 72 heart beats per minute.
Assuming an exponential service rate μ, set this up as a birth and death process and determine the birth and death rates.
In a transportation problem with 5 supply points, 3 demand points, and total supply equaling total demand, the number of decision variables will be:
The city council of Pine Bluffs is considering increasing the number of police in an effort to reduce crime. Before making a final decision,
The mean monthly demand for steam boilers is 6.8 with a standard deviation of 1.7. Compare the dispersion of these distributions. Which demand pattern has more relative variation? Explain.
A prestigious university requires a score of at least 750 on a graduate exam for admission to its MBA program. Suppose the graduate exam is normally distributed with a mean of 500 and a standard deviation of 200.
You are reviewing a scientific study where the epidemiologists sampled 1000 people from Charleston, South Carolina and measured variation at two loci, A and B.
Why use the Wilcoxon T test. What is the hypothesis statements you used? Consider do we prefer working with dependent samples or independent samples? Explain
What is the probability that of today's 1,300 callers at least 5 received a busy signal? Use the poisson approximation to the binomial.
Compute the test statistic for the goodness of fit test. At 95% confidence using the p-value approach, test the hypotheses. What do you conclude about the distribution?
Let p represent the proportion of registered voters in the state that would vote for the Republican candidate. The standard error for the proportion of those who phoned in who answered "yes" is
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