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Suppose that P, the price of a certain commodity (in dollars), and S, its total sales (in 10,000 units), are random variables whose joint probability distribution can be approximated closely with the joint probability density
Find the probabilities that
(a) the price will be less than 30 cents and sales will exceed 20,000 units;
(b) the price will be between 25 cents and 30 cents and sales will be less than 10,000 units.
A manufacturer of executive jet aircraft is concerned with its profit picture over the short run. It produces two different models of planes, x1 and x2. Its profits are $30,000 for each x1 and $20,000 for each x2. There are two major constraints o..
Describe how to draw the sample as a cluster random sample, using flights as the cluster. Describe how to draw the sample as a systematic sample from these flights.
The chemical composition of soil varies with depth. The article "Sampling Soil Water in Sandy Soils: Comparative Analysis of Some Common Methods" (M. Ahmed, M. Sharma, et al.,Communications in Soil Science and Plant Analysis, 2001: 1677-1686) desc..
Seven employees who have formed a car pool. If only three of these employees can drive, how many possible seating arrangements are there for the group?
a counter-flow heat exchanger receives 1.2 kgs of 2.0 bar saturated vapor steam that exits at the same pressure. the
Construct a 99% confidence interval for the difference in the probabilities of getting a fracture for non-cola drinking and cola drinking kids.
The hypothesis is to be tested at the 5% level of significance. The critical value from the table equals:
Show the complete ANOVA table for this test including the test statistic. The null hypothesis is to be tested at 95% confidence. Determine the critical value for this test. What do you conclude?
Develop upper and lower control limits (99.7%) for the proportion of students with complaints.
A random sample of 95 printers discovered that 20 of them were being used in small businesses. Find the 95% limit for the population proportion of printers that are used in small businesses.
In making a land-use policy decision, a planner had to consider three objectives: the development of the best economic mixture of industrial and residential uses, the preserva tion of sensitive environmental areas, and satisfying the largest indus..
a study shows that approximately 15 of all businessmen who wear ties wear them to tight. at a board meeting of 25 all
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