1.Selecting Parameters in Random Forest Algorithm.
				
				2.Distinguishing Linear and Logistic Models
				
				3.Understanding Overfitting
				
				4.Solving Overfitting in Machine Learning Models.
				
				5.What is Overfitting Regularization?
				
				6.Exploring Time Series Data: Tips and Techniques
				
				7.Calculate median absolute error  and percent of estimates
				
				8.SQL Query for Calculating Monthly Business Metrics
				
				9.SQL Query for Identifying Unique Records
				
				10.Big Data Core Concepts
				
				11.Data Processing and Technical Concepts
				
				12.Write SQL Queries Based on Requirements
				
				13.Find the Majority Number in an Array
				
				14.Determining Property Status with SQL
				
				15.Improving Long-running SQL Queries
				
				16.SQL Query Validation
				
				17.Optimizing SQL Queries
				
				18.SQL DISTINCT Usage
				
				19.SQL Time Interval Query
				
				20.SQL Clauses Usage
				
				21.SQL Table Merging
				
				22.Appraisal and Foreclosure Model Experience
				
				23.Home Price Forecast Model
				
				24.MATLAB Questions
				
				25.Signal Processing Questions
				
				26.Calculate Minimum Jumps to Reach Max Height
				
				27.List Courses Taught by Each Professor
				
				28.Find Department with Highest Average Salary
				
				29.How to test two marketing campaign strategies without within-market randomization?
				
				30.How to measure the success of a market campaign?
				
				31.What is a confidence interval and how is it interpreted?
				
				32.What is a p-value in the context of an A/B test?
				
				33.Linear Regression
				
				34.L1 vs L2 Regularization
				
				35.Overfitting: Types and Solutions
				
				36.Compute Median Absolute Error and Percent of Estimates
				
				37.Calculate the Sum of Any Range in an Array
				
				38.Find Holes in Digits
				
				39.Trailing Zeroes in Factorial
				
				40.Communication and Data Sourcing
				
				41.Predictive Modeling and Data Stationarity
				
				42.Time Series Case Analysis
				
  1. Selecting Parameters in Random Forest Algorithm. 
 How random forest choose different parameter
2. Distinguishing Linear and Logistic Models 
 linear 和logistic model 区别
3. Understanding Overfitting 
 4. Solving Overfitting in Machine Learning Models. 
 5. What is Overfitting Regularization? 
 overfitting regularization 是什么
  
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