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What is the probability of getting the first questions correct and miss the fourth (with five possible answers to each question)? (You might think of this as, "What is the probability that you get the first question correct and the second question correct and the third question correct and the fourth question incorrect?")
Which hypothesis-testing procedure would you use in the following situations? The mean time an American family lives in a particular single-family dwelling is 11.8 years.
Explain the importance of random sampling. What problems/limitations could prevent a truly random sampling and how can they be prevented?
For a population with a mean of μ = 60 and a standard deviation of σ = 24, find the Z score corresponding to each of the following samples.
Our bodies have a natural electrical field that is known to help wounds heal. Does changing the field strength slow healing? A series of experiments with newts investigated this question.
From these we calculate = 129.44; = 122.65; sx = 9.15; sy = 11.02. Perform the test H0: against the alternative H1:, using the two sample t-test, and state any assumptions you may require to do this test.
Compare 2 moving averages using MSE and compute Exponential smoothing. The subsiquent data which represents demand for company ABC's products for the last 10 months.
Determine probability of 0 nonconforming units on first sample and 2 nonconforming units on second? First gasket selected is returned to lot before the second one is selected.
What type of probability distribution will most likely be used to analyze the number of chocolate chip parts per cookie in the following problem?
Over the last ten years, the average GPA has been 3.0. Is this year's class significantly different from the long-run average? At what alpha level would it be significant?
That a sample of 40 females gives an average production which is more than that based on a sample of 36 males by more than 6 items, assuming sampling with replacement, and that, the sample size for the two sexes being the same, the average product..
Can the formal hypothesis testing approach be used for nonparametric tests? How are parametric and nonparametric statistics different?
A normal random variable with a mean of $65.16 and a standard deviation of $10.00. What proportion of the households spent between $40.00 and $50.00.
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