Designing Targeted Product Recommendations System Quiz

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Which method is used to represent text data by a vector of word frequency?

Method 3: By a vector of word frequency (correct)

Method 4: By a vector of letter frequency

Method 1: By a list of words

Method 2: By the set of words

What are considered irrelevant features for text data according to the text?

Words that are easy to pronounce

Words that appear frequently (correct)

Words that carry emotional weight

Words that appear rarely

In data mining, what does 'feature pruning' refer to?

Doubling the number of existing features

Removing irrelevant features from the dataset (correct)

Adding more features to the dataset

Selecting only the most complex features

How can categorical data be represented according to the text?

(awesome=1, burger=1, terrible=0) for 'awesome' Signup and view all the answers

What characterizes irrelevant features for numerical data?

Low variance features Signup and view all the answers

Can an algorithm handle redundant features effectively?

By removing irrelevant or redundant features Signup and view all the answers

What is the purpose of feature extraction in data mining?

Convert data into a format that is friendly to data mining algorithms Signup and view all the answers

Which phase of Data Mining involves cleaning missing and erroneous parts of the data?

Data preprocessing phase Signup and view all the answers

What does Feature selection and transformation in Data Mining primarily aim to do?

Remove irrelevant features and transform existing features Signup and view all the answers

In the context of Data Mining, what is the role of feature engineering?

Converting data into a format suitable for algorithms Signup and view all the answers

What should one focus on to achieve the Learning Objectives in Data Mining Process?

Data collection Signup and view all the answers

Which phase of Data Mining involves designing and applying analytical methods to preprocessed data?

Analytical processing phase Signup and view all the answers

What is the primary purpose of feature engineering in data mining?

To extract relevant characteristics from data Signup and view all the answers

In the context of data mining, what do objects refer to?

Data points or instances Signup and view all the answers

What is a feature in data mining?

A collection of attributes that describe an object Signup and view all the answers

Which phase of the data mining process involves converting raw data into a format suitable for algorithms?

Data preprocessing phase Signup and view all the answers

What is one of the key challenges in feature selection and transformation in data mining?

Selecting features that are less relevant to the problem Signup and view all the answers

How does good feature engineering contribute to predictive modeling in data mining?

Enables learning rules that can be used on unseen data Signup and view all the answers