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The Acme Bacon Company distributes bacon in packages labelled 500 grams. An inspector randomly selects 49 of these packages, weighs them and finds a sample mean weight of 495 grams and a sample standard deviation of 25 grams. Using a 0.01 significance level, test the inspectors claim that the company is cheating customers against the null that the mean weight is not less than 500 grams
A market research company surveyed consumers to determine their ranked preferences of energy drinks among the brands Monster, Red Bull, and Rockstar.
A newspaper ad for a manager trainee position contained the statement "Our manager trainees have a first-year earnings average of $20,000 to $24,000." Do you think that the ad is describing a confidence interval? Explain your answer.
suppose that to have power against a wider variety of alternatives the experimenter decides to base the test on the
Identify any points that lie outside a 95% Confidence Level (Mean plus or minus two standard deviations) using the above winter mean and standard deviation. Explain your answer. Graph the data.
Let's suppose that we have 2 variables year and age.. I use STATA to make them into dummy variables as follows:
If you assume returns follow a normal distribution, which investment would give a better chance of getting at least a $40 million return? Explain. (B) How could your answer to part (A) change if you knew returns followed a skewed distribution inst..
in a trial of 250 patients who received 10-mg doses of a drug daily 30 reported headaches as a side effect.a obtain a
At the .01 significance level, can we conclude that there is more variation in the selling prices of the oceanfront homes?
Suppose we have randomly and independently sampled 25 women and asked each whether she has been a victim of domestic abuse at some point in her life. Find the probability that more than 22 of the women sampled have not been the victim of domestic ..
An upper-level sociology class at a large urban university has 120 students, including 34 seniors, 57 juniors, 22 sophomores and 7 freshmen.
on the basis of datd provided by a romac salary survey the variance in annual salaries forseniors in public accounting
Find the probability that fewer than 5 are satisfied with the airlines. (c) Find the probability that 8 or more are satisfied with the airlines.
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