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Build a regression for the 891 cases that have had a bankruptcy in the past. The modeling of nonbank- rupt clients suggests an initial regression model, but you should suspect that other explanatory variables may be relevant and that coefficients may be different.
(a) Motivation. Explain the purpose of the segmentation approach that models these businesses with a history of bankruptcy from the other businesses.
(b) Method. Which variables that were not available for modeling a business without a bankruptcy become relevant now?
(c) Mechanics. Following the approach used for businesses without a bankruptcy, develop a re- gression model for predicting fees for those busi- nesses with a bankruptcy. Explain why you did or did not use a test/training sample to validate the modeling.
(d) Message. Compare your model with a compa- rable model for the nonbankrupt businesses. Use examples to illustrate the differences.
Whirltag claims that the useful lifetime of its dishwashers is normally distributed with a mean of 3 years and a standard deviation 1 year.
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
A manufacturer of computers claims its batteries last an average of 3.5 hours before needing recharging. For a sample of 10 batteries, the mean life was 3 hours and the standard deviation
If it's appropriate, find a 90% confidence interval for the proportion of houses in this zip code that have swimming pools. If it's not appropriate, explain and/or recommend an alternative action.
in sludge county a sample of 50 randomly selected citizens were tested for pinworm. of these 10 tested positive 20. the
A cognitive psycholgist believes that a particular drug improves short-term memory. The drug is safe, with no side effects. An experiment is conducted in which 8 ramdomly selected subjects are given the drug and then given a short time to memorize..
is the value t 2.12 statistically significant at the 10 level? at the 5 level?a. the value t 2.12 is significant both
In order to do so, they review 42 service calls and construct a 95% confidence interval for population mean: (2.468, 2.743). What can we conclude about the significance test of Ho: mu = 2.6 vs Ha: mu does not equal 2.6?
The GMAT scores from a sample of 50 applicants to an MBA program indicate that none of the applicants scored below 450. A frequency distribution was formed by choosing class intervals 450 to 499, 500 to 549, and so on, with the last class having a..
In this exercise, you are playing the role of a researcher that is testing new medication designed to improve cholesterol levels. When examining cholesterol in clinical settings, we look at two numbers: low-density lipoprotein (LDL) and high-densi..
A certain police officer stops cars for speeding. The number of red sports cars she stops in one hour is a Poisson process with rate 4, while the number of other cars she stops is a Poisson process with rate 1.
annual starting salaries for college graduates with degrees in business administration are generally expected to be
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