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You are the shipping manager at the Postham Company. You are interested in the percentage of packages delivered damaged. A simple random sample of 500 packages yields 16 delivered damaged and 484 delivered undamaged. How many packages should be sampled in order to be 90% confident of being within 0.9% of the actual population percentage of packages delivered damaged.
When is regression used? What are the assumptions of Linear Regression? What is correlation? How does it differ from regression? What is the interpretation of the correlation coefficient?
The simple coefficient of determination is the proportion of total variation explained by the regression line.
a^2 + b^2=c^2 + d^2 where a,b,c,d are real numbers(describe equivalence cl). For a pair of fractions a/b and c/d define a/b ~ c/d if ab=cd(same here)
Jointsoft is a great over-the-counter arthritis medication, but who will ever know about it? Unfortunately, many people with arthritis tend to be elderly and rather immobile, so advertisers of arthritis medications face limitations in ways to get ..
Discuss an example where you would use a test of hypothesis for in your professional life, personal life, education or politics. Provide sufficient details so that the context is clear and also discuss if the example involves:
Use a 0.05 significance level to test the claim that these credit rating are from a population with a mean that is equal to 700.
Finding the probability of each event in a group of events of different possibility
Determine a 95% confidence interval for true time battery pack can function before having to be recharged.
Formulate both a numerical and verbal hypothesis statement regarding your research issue. Perform the five-step hypothesis test on data pertaining to your selection.
Calculate the appropriate test statistic to test the hypotheses related to the concern and test at 5% and 1% (indicate which test you are performing; show the hypotheses, the test statistic and the critical values and mention whether one-tailed or..
What units represent the margin of error? Suppose you want to decrease the margin of error, but want to keep the 95% confidence interval. What do you need to do?
A student conducted a study on the height and weight of adult males. She collected data from 40 adult males and found that average height is 68.34 inches with a standard deviation of 14.02 inches
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