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Obtaining uniform random numbers as instructed at the beginning of the Problems section, generate four random observations from an exponential distribution with mean = 1. Then use these four observations to generate one random observation from an Erlang distribution with mean = 4 and shape parameter k = 4.
This test result prompts a state administrator to declare that the mean score for the sate's eighth graders on the examination is more than 275. at a=.04, is there enough evidence to support the claim.
Now that you are familiar with the basic concepts of statistics, what are some examples of when you have seen or heard statistics used inappropriately?
If the service manager wants to 95% confident that the overall time is correctly estimated, with a 3 percent probability of error, what sample size should be taken.
Production costs are in millions of dollars, and promotions in hundreds of thousands of dollars; S denotes success and F failure.
Following are the data collected. Should the head of the Bureau be concerned about the time taken at lunch by employees? Why?
Perform exploratory data analysis on all variables in the data set. Realizing that you have six groups, be sure that your exploratory analysis is broken down by group. When possible, include appropriate graphs to help illustrate the dataset.
Confidence in the banking system. The General Social Survey (GSS) is a sociological survey used to collect data on demographic characteristics and attitudes of residents of the United States.
An important issue facing Americans is the large number of medical malpractice lawsuits and the expenses that they generate. In a study of 1228 randomly selected medical malpractice lawsuits
Suppose that a statistic U has a probability density function that is positive over the interval a ≤ u ≤ b and suppose that the density depends on a parameter θ that can range over the interval α1 ≤ θ ≤ α2.
A student is taking a 10 question multiple choice quiz. There are four possible answers to each question. The student decides to guess at random on all 10 questions.
(a) What is the probability distribution of X? Specify any relevant parameter values. (b) What is the probability that at most one of the eight tablets will be defective? (ANSWERS WITH AN EXPLANATION PLEASE)
suppose you roll two dice simultaniously. the possible outcomes are listed
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