题目
Summer 2025 CECS 0927 02 Quiz 5.0: Module 1
单项选择题
What is the purpose of data cleaning?
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标准答案
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思路分析
The question asks about the purpose of data cleaning, a common preprocessing step in data work.
First, consider what data cleaning is intended to achieve: it involves identifying and correcting or removing inaccurate, corrupted, or missing data so that......Login to view full explanation登录即可查看完整答案
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类似问题
Data cleaning usually focuses on fixing ________ of data while data standardization usually focuses on fixing ________ of data.
SECUREWHEELS CASE STUDY SecureWheels The next 4 questions are based on this case study below. Jeremy Yashimoto is a data scientist working at SecureWheels, an insurance company headquartered in Boston that specializes in car insurance. Jeremy is working on a variety of projects that will inform marketing and the application process for a new insurance product for motorcycles. They have been offering the insurance for 6 months and have collected the following data points: Variable Description Sample Value customer_id Unique customer number c15034 origination_date Date when customer was approved for the policy 2025-10-23 customer_age Current age of customer 32 number_of_policies Total number of other policies at SecureWheels 2 monthly_payment Monthly policy premium (payment) 450 number_of_claims Number of insurance claims on the policy since origination 1 motorcycle_type Street/Touring/Dirt/Sport/Scooter Street number_of_citations_5_years Number of police citations in the last 5 years in any vehicle 2 customer_survey_sentiment Positive/Neutral/Negative Neutral SecureWheels has launched a new motorcycle insurance product and collected raw customer data during the first six months. Jeremy, a data scientist, notices inconsistent formatting across payment values and dates when preparing the dataset for modeling. Which transformation tasks best prepare the data?
Q2 What is the primary goal of data cleaning (aka data munging)?
Q2 What is the primary goal of data cleaning (aka data munging)?
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