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A psychologist is studying the self image of smokers, which she measures by the self-image (SI) score from a personality inventory. She would like to estimate the mean SI score, μ, for the population of all smokers. She plans to take a random sample of SI scores for smokers and estimate μ via this sample. Assuming that the standard deviation of SI scores for the population of all smokers is 82, what is the minimum sample size needed for the psychologist to be 95% confident that her estimate is within 20 of μ?
A random sample of 100 is taken from a population with a mean of 140 and standard deviation of 25. What is the probability that the sample mean lies
imagine that there are 100 different researchers each studying the sleeping habits of college freshmen. each researcher
Let X be the number of correct answers when the student has to guess each answer. Compute the probability function and the mean and variance of X.
Suppose there are three objects to sell. How much synergy is necessary so that in a symmetric equilibrium each bidder bids the same amount for each object?
Using a p level of 0.05 and a two-tailed test, what is the critical value?- Assume the researcher calculated H = 9.26. Make a decision regarding the null hypothesis and explain that decision.
The grouped frequency distribution below summarizes the results. Based on the grouped frequency distribution, you are to identify the mean and median for waiting times.
Find the minimum length for the top 7% of lengths. (Draw a sketch; express answer to three decimal places.)
a. Draw a probability tree for this situation. b. What is the probability that you will win a contract?
Wild horses. Large herds of wild horses can become a problem on some federal lands in the West. How many herds of wild horses were studied
James Dobson, founder of Focus on the Family, says that men have the divine obligation to lead their families, and women have the divine obligation to submit.
When such digits are randomly generated, what is the distribution of those digits? Given such randomly generated digits, what is a test for "goodness-of-fit"?
you are required to provide a portfolio of 3000 words comprising two equal elements as followspart onethis will
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