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A local TV network wants to run an informal survey of individuals who exit from a local voting station to ascertain early results on a proposal to raise funds to move the city-owned historical museum to a new location. How might the network sample voters to approximate random sampling?
the following problem should be answered in rgenerate 50 normal distributions with mean 15 and standard deviation 3
Three different instructional techniques are being considered for training mechanics to perform a difficult emissions-reduction adjustment on fuel-injection engines.
an urn contains 4 white and 4 black balls. we randomly choose 4 balls without replacement this constitutes one trial.
A random sample of 225 SAT scores has a mean of 1522. Assume that SAT scores have a population standard deviation of 300. construct a 95% confidence interval estimate of the mean SAT scores.
Conduct a statistical test to determine if the sample is representative of the population.
the t distribution has more area in the tails and less in the center than does the standard normal
Assume the arrival of these emails is approximated by the Poisson distribution.
Agency wants to select samples from 10 landfills. The director has 15 landfills from which she can collect samples. how many different samples are possible?
in designing an experiment involving a treatment applied to 5 test subjects researchers plan to use a simple random
agri-pro is a company that sells agricultural products to farmers in a number of states. one service it provides to
Fitting of simple linear regression equation - Given the student population for a school district over the past few years, find the prediction equation for this data.
Suppose you are given the following estimated regression equation: Debt Ratio = 4000 + .20 Cash Flow. If the t-stat for the slope estimate is 3.25, what can you conclude?
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