28 Questions
Data preprocessing is not necessary before data analysis.
False
Incomplete data with lacking attribute values does not affect data quality.
False
Noise in data refers to errors or outliers.
True
Data inconsistency is not a concern in data preprocessing.
False
Quality decisions can be made based on poor quality data.
False
Data preprocessing involves tasks such as filling in missing values and identifying outliers.
True
Data transformation in preprocessing involves randomizing the data for better analysis results.
False
Data reduction in preprocessing aims to increase the volume of data for more accurate analytical results.
False
Missing data in a dataset can occur due to equipment malfunction or intentional removal of valuable information.
True
Data preprocessing may involve inferring missing data based on the available information.
True
Handling missing data is not a crucial step in the data preprocessing process.
False
Equal-width partitioning divides the range into N intervals of different sizes.
False
Equal-depth partitioning divides the range into N intervals with different sample quantities.
False
Binning methods for data smoothing involve sorting data only.
False
Linear regression is used to fit data into regression functions.
True
Cluster analysis involves detecting and removing outliers.
False
Semi-automated methods combine computer and human inspection to only detect suspicious values.
False
Ignoring the tuple is always an effective method when the class label is missing in a classification task.
False
Filling in missing values manually is a quick and efficient process.
False
Using a global constant like 'unknown' to fill in missing values introduces a new class.
True
Filling in missing values with the attribute mean improves data quality.
True
Using the attribute mean for all samples of the same class to fill in missing values is not a smarter approach.
False
Noise in data is usually caused by consistent and accurate measurements.
False
Data cleaning is one of the steps involved in preprocessing the data.
True
Data integration involves combining data from a single source into a coherent store.
False
Schema integration in data preprocessing refers to resolving conflicts between different data types.
False
Detecting and resolving data value conflicts is a part of the data integration process.
True
Incomplete data with lacking attribute values does not impact data quality during preprocessing.
False
Test your knowledge on the fundamentals of data preprocessing in analytics modelling based on notes by Jiawei Han and Micheline Kamber. The quiz covers topics such as data cleaning, integration, transformation, reduction, discretization, and concept hierarchy generation.
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