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Problem
1. Using the concept of overfitting, explain why when a model is fit to training data, zero error with those data is not necessarily good.
2. In fitting a model to classify prospects as purchasers or non-purchasers, a certain company drew the training data from internal data that include demographic and purchase information. Future data to be classified will be lists purchased from other sources, with demographic (but not purchase) data included. It was found that "refund issued" was a useful predictor in the training data. Why is this not an appropriate variable to include in the model?
CSC 553 Advanced Database Topics Assignment. Consider the relation r (Key, Name, Address). The relation takes 200 blocks on disk and holds 10000 tuples. What is the selectivity of an equality predicate on Key
Provide example that is relevant to a college environment that illustrates reasons for converting database tables to the First, Second, and Third Normal Forms.
Discuss the degree to which you believe the Visio diagram reflects the database design. Create the appropriate relationships between each entity within the diagram.
The chairperson in the ISOM department at GMU needs to create a database to keep track of all the courses offered by the department.
Implementation of business analytics, an organization will also need to implement a good information systems plan in order to collect, manage, and organize all of the data.
Discuss the relationship between colossal and core patterns. What is boosting? State why it may improve the accuracy of decision tree induction? Ensemble methods improve classification accuracy. How?
Develop a domain model for the car park system. Express your model with a class diagram, showing any inheritance and compositional relationships.
Design a suitable database system with a suitable web based front end, which should include the following details :The web based interface should hab=ve necessary forms and fields to update student attendence,marks ,faculty profile,faculty workshops ..
Using specialization hierarchies can provide an efficient application development structure. Justify the use of surrogate primary keys for a database design.
ER Diagram of cardinality and modality bank management system and discription of bank management system
What is the capacity of a hard drive (in GB) consisting of 120,000 tracks, 4,000 sectors, and 4 surfaces? Assume each block has 512 bytes.
Write a 2 to 3 page essay describing the use of an OLAP Data Cube. Your essay should also describe the operations of Drill Down, Roll Up, Slice, and Dice.
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