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Question: Good wood? A lab supply company sells pieces of Douglas fir 4 inches long and 1.5 inches square for force experiments in science classes. From experience, the strength of these pieces of wood follows a Normal distribution with standard deviation 3000 pounds. You want to estimate the mean load needed to pull apart these pieces of wood to within 1000 pounds with 95% confidence. How large a sample is needed? Show your work.
This difference is an example of the NIMBY (Not In My BackYard) phenomenon and is a serious concern to policy makers and planners.
Formulate a linear programming model for this investment problem. Define the decision variables. Determine the objective function. What does it represent
he chi-square test ignores the ordering of the responses. Use the Kruskal-Wallis test (with many ties) to test the hypothesis that some SES classes smoke systematically more than others.
Conduct statistical analyses including correlations, regression, and discriminant analysis
After a visit from his mother, he adds oranges to his diet. Oranges cost $0.56/pound in 1995. Here are the food faddist's food purchases in 2005.
An elementary school class ran one mile with a mean of 11 minutes and a standard deviation of three minutes.
M&M's. The candy company claims that 10% of the M&M's it produces are green. Suppose that the candies are packaged at random in small bags.
Larry Jacava is considering producing a novelty item for golfers that will be sold through pro shops. Larry has decided on a selling price of $3.50 for the item. The item's variable cost of production is $2.00 per unit with a fixed cost of $3,750.
If 4.01% of these DVD players have a life span of more than 8 years, what is the standard deviation of the DVD player's life span?
Use the fact that the sum of independent normal random variables is normally distributed, with mean equal to the sum of the individual means and variance equal.
the average life expectancy in the united states l has been rising steadily over the past few decades as shown in the
program evaluation review technique pert has definitely taken over as the leading approach to planning scheduling and
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