identify two methods for obtaining a simple random sample

A student government organization is interested in estimating the proportion of students who favor a mandatory “pass-fail” grading policy for elective courses. A list of names and addresses of the 645 students enrolled during the current quarter is available from the registrars office. Using three-digit random numbers in row 25 of the table of random numbers and moving across the row from left to right, identify the first 10 students who would be selected using simple random sampling. The three digit random numbers begin with 130, 919, and 811. (Enter your answers as a comma-separated list.)

It is difficult to conduct sample surveys on sensitive issues because many people will not answer questions if the answers might embarrass them. Randomized response is an effective way to guarantee anonymity while collecting information on topics such as student cheating or sexual behavior. Here is the idea. To ask a sample of students whether they have plagiarized a term paper while in college, have each student toss a coin in private. If the coin lands heads and they have not plagiarized, they are to answer "No." Otherwise they are to give "Yes" as their answer. Only the student knows whether the answer reflects the truth or just the coin toss, but the researchers can use a proper random sample with follow-up for nonresponse and other good sampling practices. Suppose that in fact the probability is 0.4 that a randomly chosen student has plagiarized a paper. Draw a tree diagram in which the first stage is tossing the coin and the second is the truth about plagiarism. The outcome at…

Generate 10000 instances of a poisson (10) random variable and then compute the sample mean, sample variance, and sample standard deviation.