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The average zinc concentration taken from a sample of zinc measurements in 25different locations is found to be 3.0 ounces per gallon. Find the 95 % confidence interval for the mean zinc concentration in the river. Assume that the population is normally distributed with a standard deviation of 0.2.
Compute the following linear programming problem and describe the special case of a linear programming problem in which.
What is ethics? Ethics is basically concerned with the Moral obligations, responsibilities and social justice of the world. It invokes the idea of "how people should act".
A scientist wants a confidence interval of 90% and a margin of error of +-2 for a mean of a Normal population with σ =10. What size samples should she take?
There are two rejected units. If a customer orders 180 units, what is the probability that the delivery will have at least one reject unit?
In forestry there appears to be a correlation between the diameter of a tree at breast height and the totol height of the tree. For the following sample of ten white spruces first construct a scatter plot then find the correlation (r) between heig..
The budgeting process for a Midwestern college resulted in expense forecasts for the coming year (in $ millions) of $9, $10, $11, $12, and $13. Since the actual expenses are unknown, the following respective probabilities are assigned: .3, .2, .25..
A multiple choice quiz has 150 questions each with 5 choices and only 1 is the correct answer. What is the probability that sheer guess work yield from 30 to 40 correct answers out of the 150 questions?
Suggesting that the combined sample evidence tends to refute the hypothesis that the coin is fair. Explain this apparent discrepancy.
What is the level of measurement for the variable, "political ideology" measured as "Very Conservative", "Conservative","Moderate", "Liberal" and "Very Liberal".
Create an research question, and then state the experimental and null hypotheses. Then, explain why null and alternative hypotheses have to be mutually exclusive. Finally, discuss how Type I and Type II errors are related to your hypotheses.
Construct the 90% and 99% confidence interval for population mean. Which interval is wider? If convenient, utilize technology to construct confidence intervals.
Describe how the three interval estimates will be related to each other. Which of the three intervals is most likely to contain the population mean?
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