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Gain Communications sells aircraft communications units to both the military and the civilain markets. Next year's sales depend on market conditions that cannot be predicted exactly. Gain follows the modern practice of using probability estimates of sales. The military division estimates its sales as follows.
X = units sold 1000 3000 5000 10000Probability 0.2 0.2 0.3 0.3The corresponding sales estimates for the civilian division are as follows.Y = units sold 300 500 750Probability 0.4 0.5 0.1We have already calculated the following statistics.μX = 5300 units; σX2 = 11410000; μY = 445 units; μZ = $12157500, where Z = 2000X + 3500Y
Find the standard deviation of the estimated profit, Z = 2000X + 3500Y.
What was the probability that a student worked a part time job or made the Dean's list. Interpret the results.
What is the percentage of variation in the dependent variable explained by the variation in the independent variable.
Using an alpha of .05, what can you conclude about homogeneity of variance from the output? Word process your responses on the SPSS output pages.
What would be the most appropriate graphical representation to show the dispersion of new home prices in a particular area? Why?
Does the data prove a significant difference in mean times?
The Smoky Bear Trucking Company claims the average weight of a fully loaded moving van is 12,000 lb. The highway patrol decides to check this claim.
Which statistical analysis technique should be used? What is the null hypothesis? Can an analysis be performed? Why or why not?
Population blood pressure (BP) of patients is normally distributed, with a mean of 127, and standard deviation of 8. A random sample of 49 patients in the hospital found an average BP of 125.
The engineer in a widget factory wants to test out a new form of raw materials. So a batch of widgets are made in the old manner as a control group and then a batch are made with the new materials as a comparison.
Kind of examination produced significant main effects on both mean mark and time taken to complete the examination.
Using multiple linear regression, compute the regression equation for the following data in Excel.
A process has a capability index of 0.40. This index is interpreted to mean that the process is:
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