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1) When is regression used? What are the assumptions of Linear Regression?
2) What is correlation? How does it differ from regression? What is the interpretation of the correlation coefficient?
Determine the 95% confidence interval for your estimate what data have you utilized as the basis of your predictions what suppositions have you made.
A representative of the environmental protection agency (EPA) wants to select samples from 10 landfills. The director has 15 landfills from which she can collect samples.How many different samples are possible?
The accounting department at Weston Materials, Inc., national manufacturer of unattached garages, reports that it takes two construction workers mean of 32 hours and standard deviation of 2 hours to erect the Red Barn model.
The histograms of some sampling distributions are symmetrical. T-F What would make a histogram symmetrical, and give an example of a symmetrical distribution? A random sample of size 36 is to be selected from a population that has a mean μ = 50 an..
A school tracks the absences of pupils as part of a flu surveillance system. Regular reporting of absences among 25 students in grade 1 are taken, and based on these data, the long-run proportion of absences under normal conditions is estimated to..
A fair die is rolled nine times. What is the probability that an odd number (1,3 or 5) will occur less than 3 times?
If were interested in studying obesity in a small sample size of 10 adult men by looking at their body weights and heights, would you say that trimming the mean is a good idea? What are the advantages of trimming the mean in this situation? What a..
Run a simple regression of the dependent variable demand on the independent variable price and observe the coefficient on price.
Describe a specific application of statistics that either has a direct effect on you or your life.
Find out the probability that a student from the whole school system, chosen at random, has passed?
Use the population standard deviation along with the sample mean, S, and find a 92% confidence interval for the population mean. Is the true population mean contained in this interval?
Use this information to find the upper and lower limits of the first class if you wish to construct a frequency distribution with 10 classes.
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