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Suppose that you are working for a phone company that wants to predict churn. Churn is when customers cancel their subscriptions. Let x designate a customer, let actual be a binary random variable meaning that the customer actually churns, and let flag be a binary random variable meaning that a classifier predicts that the customer will churn. Note that P(actual = 1) is the churn base rate, that is the fraction of customers that really do churn. Similarly, P(flag = 1) is the fraction of customers that are predicted to churn. We know that the churn base rate is 5%. Define a = P(actual = 1|flag = 1) and b = P(actual = 0|flag = 0). You have hired Dr. Lin as a data mining consultant. He claims that he can train a classifier that will achieve a = 0.8 and b = 0.9
Crypto device encrypts every message into 20 bits of ciphertext.
Cutting a stick, A stick n inches long needs to be cut into n 1-inch pieces. Outline an algorithm that performs this task with the minimum number of cuts if several pieces of the stick can be cut at the same time. Also give a formula for the minim..
Write an application that stores at least four different course names
Consider the following code segment,int[] arr = {1, 2, 3, 4, 5, 6, 7}; for (int k = 3; k
Develop sequence diagrams for the use cases Enter New Order, Create Case Manifest and Record Order Fulfillment . Update the design class diagram with attribute information and method signatures derived from the sequence diagrams.
Consider processor with six stages: IF(instruction fetch), DA(instruction decode), CO(calculate operands addresses), FO(fetch operands), EX(instruction execution), WB(write results). Explain briefly what occurs in each stage when instruction going ..
This formulation uses n processes to sort n elements. Based on this approach, derive a parallel formulation that uses p processes, where p
Discuss how grassroots computing changes the way software is designed, developed, tested, and maintained in a typical organization. What are the advantages and disadvantages of grassroots computing?
Describe what each of the two-dimensional characters might represent and the data that would be held in the array. Also, provide an example array declaration.
List all active male students assigned to Advisors 1 or 3 (Fred Stone or Jack Simpson). Provide a list of all students without a biography. What classes are in the English department?
Need a a java program that can be used to conduct an election
Consider a system needed to store information about computers in a computer lab at a university, such as the features and location of each computer. Ascertain the domain classes that might be included within the domain model. Discuss whether or not y..
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