Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Chapter 10, Problem 10E
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Four ways to use weblogs data can be beneficial to the website:
1. Marketing:
Information stored in log data can be very useful for marketers. Using this data, marketers can understand how various visitors search their website and use it to make purchases. It helps in understanding previously lost sales and offers improvement in potential areas.
2. Analysis:
Analysis of the log data helps in understanding various aspects of the website such as response time. This part is also related to product analysis and service analysis. This can help in attracting more page requests. Analysis of various error messages can offer insights into working on user-friendliness as well as interface improvement. One can learn more about customer base, geo-location, etc...
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(Short-answer) b. Continue from the previous question. Suppose part of the data you extracted from the data warehouse is the following. Identify the missing values you think exist in the dataset. Use Column letter and Row number to refer to each missing value in the dataset. Please write down how you want to address each particular missing value (you can group them if they receive same treatment). For imputation, you do not need to calculate the exact imputed values but just describe what kind of value you want to use to impute.
Please original work
Locate data warehousing solutions offered by IBM, Oracle, Microsoft, and Amazon
Compare and contrast the capabilities of each solution and provide several names of some organizations that utilize each of these solutions.
Please cite in text references and add weblinks
Need Help: Which of the following statements about confusion matrix is wrong
A) Confusion matrix is a performance measure for probability prediction techniques
B) Confusion matrix is derived based on classification rules with cut-off value 0.5
C) Confusion matrix is derived based on training partition to measure a model’s predictive performance
D) None of the above
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- I have a few questions I need help with Statement: When we build a nearest neighbor model, we shall not remove the redundant dummies when coding a categorical variable. True or False Statement: One reason why a neural network model often requires a significant number of data observations to train is that it often has a significant number of model parameters to estimate even if there are only a few predictors. True or False. Which of the following statements about confusion matrix is wrong A) Confusion matrix is a performance measure for probability prediction techniques B) Confusion matrix is derived based on classification rules with cut-off value 0.5 C) Confusion matrix is derived based on training partition to measure a model’s predictive performance D) None of the abovearrow_forwardStudent ID is 24241357arrow_forwardWhich of the following methods help when a model suffers from high variance? a. Increase training data. b. Increase model size. c. Decrease the amount of regularization. d. Perform feature selection.arrow_forward
- 57 Formula 1 point Use shift folding, length 3, on the following value to calculate the Hash Value. 114184121 Type your answer...arrow_forwardWrite a program that reads a list of 10 integers, and outputs those integers in reverse. For coding simplicity, follow each output integer by a space, including the last one. Then, output a newline. Ex: If the input is: 2 4 6 8 10 12 14 16 18 20 the output is: 20 18 16 14 12 10 8 642 To achieve the above result, first read the integers into an array. Then output the array in reverse. 623802 1031906 nx3zmv7.arrow_forward6.3B-2. Multiple Access protocols (2). Consider the figure below, which shows the arrival of 6 messages for transmission at different multiple access nodes at times t=0.1, 0.8, 1.35, 2.6, 3.9, 4.2. Each transmission requires exactly one time unit. 1 2 3 4 t=0.0 t=1.0 t=2.0 t=3.0 5 6 t=4.0 t=5.0 For the slotted ALOHA protocol, indicate which packets are successfully transmitted. You can assume that if a packet experiences a collision, a node will not attempt a retransmission of that packet until sometime after t=5. 1 2 3 4 5 Karrow_forward
- Problem of checking Compile errors Runtime errors ======== } ng; } You have the following IQueue interface. Implement a Queue class derived from IQueue. You can use STL containers discussed in class, such as vector, queue, stack, deque, map. #include using namespace std; class IQueue { public: }; virtual void Enqueue(int val) virtual int Dequeue() = 0; virtual int Size() const = 0; int main() = 0; { Queue q; ===== } cout << q.Size() << endl; q. Enqueue(10); q.Enqueue(20); q. Enqueue(30); cout << q.Size() << endl; cout << q.Dequeue() << endl; cout << q.Size() << endl; cout << q.Dequeue() << endl; cout << q.Size() << endl; cout << q.Dequeue() << endl; cout << q.Size() << endl; ==== ====arrow_forwardlogicarrow_forwardQ1: For the Figure Below if the input to the first tank is step with magnitude 2 find 1. What type of relation between (tanks 1 and 2) and tank 3 2. Initial real value of H2, if the steady state value is 10 3. Final Value of H3 4. H1 at t=1.5 5. For the system tank1 and tank 2 only which case is applied to them (overdamping, underdamped or critically damping) A₁=1 A₂=1 Tank 1 R₁ = 2 * Tank 2 R₁₂=2 A3=0.5 hy R₁=4 Tank 3arrow_forward
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