Question 1 Decision Trees Using the following dataset: y z Class F A T A F F T B T F A F F в T F B F A What is the entropy of the entire dataset? Hint: Which proportion of the data is class A? class B? Hint 2: Then entropy: I = –Pa log2 PA – PB log2 PB log z Hint 3: If your calculator can't directly do log base-2, remember log, x = log 2

Question 1 Decision Trees Using the following dataset: y z Class F A T A F F T B T F A F F в T F B F A What is the entropy of the entire dataset? Hint: Which proportion of the data is class A? class B? Hint 2: Then entropy: I = –Pa log2 PA – PB log2 PB log z Hint 3: If your calculator can't directly do log base-2, remember log, x = log 2

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Assume we wish to resize an existing hash table because the current hash table is becoming too small for the application. Without writing code briefly describe the process of resizing a hash table by "copying" the old data to the new hash table. What is the expected complexity of your process using Big-O notation. Justify your complexity measure. An example of a hash table before resizing is given.
2770 def difference(self, source): 278 279 A280 Efficiency: 281 Return a set that contains the items that only exist in self and not in source. 282 283 Maximum size of target Set is the maximum size of self. Use: target = self.difference(source) 284 285 286 287 Parameters: 288 source - a set (Set) 289 Returns: - a set containing one copy of all the values target in self that are not in source (Set) 290 291 292 Examples: (1,2,3) difference (3,2,1) is () (1,2,3) difference (4,5,6) is (1,2,3) (1,2,3,4,5,6) difference (0,2,4,6,8) is (1,3,5) 293 294 295 296 297 298 299 300 # your code here
In $12.2 Lamport's Hash we mentioned the notion of using only 64 bits of the hash. At each stage, 128 bits are computed, 64 bits are thrown away, and the hash of the retained 64 bits is used in the next stage. The purpose of only using 64 bits is so that a human does not need to type as long a string. Assuming the person will still only type 64 bits, does it work if hash" does a hash of all 128 bits of hash"-1, but what the person actually transmits is 64 bits of the result?
Please code with Python(.py)--> Explanation: I have attached the Explanation picture as well.
2. Write a program by implementing your own PRNG (e.g., using a hash function). You must not use any existing random class or function but implement your own. Produce random bytes (like above). Note the purpose of this part is not to design a strong PRNG that passes randomness tests, but rather for comparison with an existing strong PRNG (above).
TODO: Polynomial Regression with Ordinary Least Squares (OLS) and Regularization *Please complete the TODOs. * !pip install wget import osimport randomimport tracebackfrom pdb import set_traceimport sysimport numpy as npfrom abc import ABC, abstractmethodimport traceback from util.timer import Timerfrom util.data import split_data, feature_label_split, Standardizationfrom util.metrics import msefrom datasets.HousingDataset import HousingDataset class BaseModel(ABC): """ Super class for ITCS Machine Learning Class""" @abstractmethod def fit(self, X, y): pass @abstractmethod def predict(self, X): pass class LinearModel(BaseModel): """ Abstract class for a linear model Attributes ========== w ndarray weight vector/matrix """ def __init__(self): """ weight vector w is initialized as None """ self.w = None # check if the matrix is 2-dimensional. if not, raise an…
1.Attached is a sample data frame of tweets data extracted between 2016-2022. I want a python code to show the distribution of tweets per year over that time period. 2. I want a python code of a force directed graph of a user like CABI_Plantwise, where i can see the interactions with that account
I want genuine answer not copied
hash table
Suppose you generate the following RSA key pairs: • p = 37199• q = 49031• N = p · q = 1823904169• (p − 1) · (q − 1) = 1823817940• e = 65537 (for encryption)• d = 1578812933 (for decrption)Assuming a=01, b=02, . . . , z=26, and we group the digits in groups of three. (i) If someone wants to send the following message: “SELLALL” using your public key, what strings of digits should they send you (i.e., encrypt this message)?
Suppose you generate the following RSA key pairs:• p = 37199• q = 49031• N = p · q = 1823904169• (p − 1) · (q − 1) = 1823817940• e = 65537 (for encryption)• d = 1578812933 (for decrption)Assuming a=01, b=02, . . . , z=26, and we group the digits in groups of three. (ii) If you receive strings of digits from a sender: 199770170, 1288754980, 324346846, 1370682962, decrypt the message.