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The procedure used to obtain your sample (i.e., random or nonrandom sampling) is not the same as the procedure for assigning participants to conditions; distinguish between random sampling and random assignment.
a television ratings analyst estimates that at least 72 of u.s. adults enjoy science fiction shows. in a random sample
What is the Three-Fourths Rules (or Three-Quarters Rule)? How does the Three-Fourths Rule (or Three-Quarters Rule) help prevent misrepresentation of data
Step 1: Find the expected value E(X). Step 2: Find the standard deviation.
a survey found that womens heights are normally distributed with a mean 64.4 in. and a standard deviation 2.5 in. a
However your friend wants to save money on this trial an use a small number of batteries for the test (n 100). What are the pros and cons of these two positions?
a consulting firm submitted a bid for a large research rject. the firms managment initaly felt they had a 50 50 chance
six students three boys and three girls lineup in a random order for a photograph. what is the probability that the
according to the texas department of state health services there are approximately 17.7 million adults age 18 living in
A recent report in Business Week indicated that 20 percent of all employees steal from their company each year. If a company employs 50 people, what is the probability that: Fewer than 5 employees steal?
When the level of confidence and sample standard deviation remain the same, a confidence interval for a population mean based on a sample of n = 100
Give an example of a good decision that you made in the face of some uncertainty. Was the outcome lucky or unlucky? Can you give an example of a poorly made decision whose outcome was lucky?
Determine the first- and second-order terms of a Taylor series expansion of the ratio estimator. Use the approximation to obtain an approximate expression for the bias of the ratio estimator under simple random sampling.
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