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Suppose that X is a discrete random variable with
P(X = 0) = 2/3µP(X= 1) = 1/3µP(X= 2) = 2/3(1 - µ)P(X= 3) = 1/3(1 - µ)
where 0 <= μ <= 1 is a parameter. Thefollowing 10 independent observations were taken from such adistribution: (3,0,2,1,3,2,1,0,2,1).
(a) Find the method of moments estimate of μ(b) Find an approximate standart error for your estimate.(c) What is the maximum likelihood estimate of μ?(d) What is an approximate standard error of the maximum likelihood estimate?
A drug company is considering marketing a new local anesthetic. The effective time of the anesthetic the company is currently producing has a normal distribution with an average of 7.5 minutes and a standard deviation of 1.2 minutes.
The J.O. Supplies Company buys calculators from a Korean supplier. The probability of a defective calculator is 10%. What is the probability that 4 or more of the calculators will be defective?
Under new grading scale, how many students will have A's, B's, C's, D's and F's? Do you beleive the instructor must grade on a curve? Explain why or why not?
a) What statistical test should be used to analyze these data? b) Identify H0 and Ha for this study. c) Conduct the appropriate analysis d) Should H0 be rejected? What should the researcher conclude?
Choose a research article from your field.Write the five hypotheses that this study is testing.Write both the null and alternative hypotheses for each one.
Using the probability formulas, find the proportion of employees who either have MBAs or are managers.
The difference between expected payoff under certainity and expected value of the best act without certainity is the expected:
In Major League Baseball there are five teams in the Western Division of the National League: Arizona, Los Angeles, San Francisco, San Diego, and Colorado. How many different orders of finish are there for these five teams?
What if the size for each sample were increased to 20? Would a sample mean of 115 or more be considered unusual? Why or why not? Why is the Central Limit Theorem used?
An exam consists of 10 true or false questions. If a student guesses at every answer, what is the probability that he or she will answer exactly six questions correctly? (Round the answer to three decimal places)
What is the likelihood that the mean annual precipitation during 25 randomly picked years will be less than 90.8 inches?
Clearly identify the independent and dependent variables you would study. Determine whether a one-tail or two-tail test is most appropriate and explain why. Generate a testable null statistical hypothesis and an alternative statistical hypothesis.
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