Ask Question, Ask an Expert


Ask DBMS Expert

Home >> DBMS

problem 1) Categorical variable tread Pattern = {A, B} and numerical variable tread Depth are used to classify Handling = {good, poor} of a vehicle. Depth is normally distributed with mean 9 and standard deviation 3 when Handling is good and mean 16 and standard deviation 4 when Handling is poor.

There are 300 rows of data for training and the number of rows of data for each combination of Pattern and Handling are given in the table below.

1228_pattern and handling.jpg

Given row x0 = (Pattern = A, Depth=12). Use a naive Bayes’ classifier to compute the class of Handling assigned to x0. Show your work for full credit.

problem 2) Consider the following neural network for two predictors Thickness and Alignment and two classes Print Quality High and Low. Some weights are shown in the table, including weights for constant (threshold) nodes that link to each output node.

1751_neural network.jpg

Suppose input data row x0 produces z1 = 0.5 at node H1 and z2 = 0.4 at node H2. Assume the softmax function is used at the outputs. Compute the output at each output node. To what Print Quality class is row x0 assigned?

problem 3) In either the design or training of a neural network, provide a list of several ways to reduce the complexity of the model.

problem 4) Consider a support vector machine with three inputs x1, x2, and x3. Assume there are only two support vectors with values and parameters as follows:

405_vector machine.jpg

problem 5) Consider one versus the rest voting used for classifier with three classes {a, b, c}. Given a row of data denoted as x0 suppose that the classifier for a versus the rest predicts the rest, b versus the rest predicts the rest, and c versus the rest predicts c. What are the votes for each class for x0?


problem 6) Consider the data with categorical predictor x1 = {green or red} and numerical predictor x2 and the class variable y shown in the following table. The weights for a round of boosting are also shown in the table. Suppose the classifier built from this round of boosting assigns y = 1 for x2 < 0.45 and y = -1 for x2 > 0.45. Compute the coefficient α for this classifier in the boost algorithm.

425_categorical predictor.jpg

problem 7) A data set with 1000 rows is input to a neural network in Weka. The test option is set to 10-fold cross validation and the neural network option validationSetSize = 20%. How many rows of data are used in a validation set in a fold?

A support vector machine in Weka uses a Gaussian (radial basis function) kernel with parameter gamma. Gamma should be selected less than or equal to one. Circle True or False.

A support vector machine in Weka uses a Gaussian (radial basis function) kernel with parameter gamma = 0.2. This corresponds to the parameter σ2 equal to what value?

problem 8) Given a dataset with 1000 rows and 25 predictors labeled x1, x2, …,x25 to classify into two classes {a, b}. Consider the small random forest with 3 trees and one split in each tree as shown below. Here 5 predictors are selected randomly at each node. The class assigned to each leaf node is also shown.


a) Given a row of data x0 with x1= green, x5 = 4, x9 = 9, predict the class label for the row.

b) For Tree1, it can be concluded that the best split among all 25 predictors is obtained from x1. Circle True or False.

c) Approximately 368 rows are expected to be out of bag for Tree 1. Circle True or False.

d) Categorical variables are coded to {0, 1} indicator variables in a random forest. Circle True or False.

problem 9) Suppose the random sample used for each tree in the previous random forest is decreased from 1000 rows to 500 rows. Circle ALL that are true for the ensemble classifier.

a) Variance of predictions is expected to decrease.

b) Bias of predictions is expected to decrease.

c) Each base classifier is expected to have more out of bag rows of data.

d) Generalization error is expected to decrease.

problem 10) A Bayesian network is shown for the variables paper Thickness, paper Alignment and Print Quality. The conditional probabilities are provided in the tables beside the nodes. Here, Thickness = {high or low}, Alignment = {straight or angled}, and Print Quality = {good or bad}.

1930_bayesian network.jpg

find out the following quantities from the information in the Bayesian network.

a) P(Alignment = straight)

b) P(Alignment = straight | Print Quality = good)

DBMS, Programming

  • Category:- DBMS
  • Reference No.:- M9377

Have any Question? 

Related Questions in DBMS

How up-to-date should data warehouse information

HOW UP-TO-DATE SHOULD DATA WAREHOUSE INFORMATION BE? Information timeliness is a must in a data warehouse-old and obsolete information leads to poor decision making. Below is a list of decision-making processes that peop ...

Restaurants and fast-food chains rely heavily on business

Restaurants and fast-food chains rely heavily on business intelligence to make important decisions. Casinos do as well. Some of the leading restaurants, fast-food chains, and casinos using data warehouses include AFC Ent ...

Lab modifying a database design in visiothis assignment

Lab: Modifying a Database Design in Visio This assignment contains two Sections: Visio Diagram and Design Summary. You must submit both sections as separate files in order to complete this assignment. Use "Appendix A: De ...

Query 1list all movies played in landmark or music box

Query 1 List all movies played in Landmark or Music Box. Output only titles and eliminate duplicates. Query 2 List all stars born after 1960. Order them by their birthdate in ascending order. Output their first names, la ...

Projectinstructionsfor the purpose of grading the project

Project Instructions: For the purpose of grading the project you are required to perform the following tasks: Instructions 1 Open the start file Day Spa that you recently downloaded then Save the workbook as Lastname_Fir ...

1 how are qbe tools and sql similar2 how are they

1. How are QBE tools and SQL similar? 2. How are they different? 3. What is a data warehouse? 4. How does it differ from a database?

Tasks objectives1 manage client-server connections using

Tasks Objectives: 1. Manage client-server connections using RDBMS Net Services 2. Evaluate requirements and select appropriate parameters to ensure effective storage management in a database system 3. Manage Redo log inf ...

Homeworkgiven the relations below answer the following

HOMEWORK Given the relations below, answer the following queries using SQL. Note that the tables contain sample records only and do not represent all the possible records that could be stored in these tables. MEMB ERS ME ...

Discussion questionsdatabase programs are used to store and

Discussion Questions Database programs are used to store and to retain data for a variety of applications, and are often used in conjunction with Web content to deliver dynamic Web pages. Please respond to all of the fol ...

Discussionyou have been asked to help a critical

Discussion You have been asked to help a critical infrastructure company in analyzing the privacy and security of a SCADA system. Conduct research on the topic and answer the following: 1. How would you describe general ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen