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What does the accuracy metric measure in text classification?

How does TF-IDF improve upon Bag of Words?

ChatGPT is a popular text generation tool.

What does tokenization do?

An HR department is analyzing job descriptions. To improve keyword searches, their system converts all text into lowercase, removes punctuation, and eliminates extra spaces.  What preprocessing step is this?

A sentiment analysis on restaurant reviews is not producing meaningful results.  The team notices that words like “was,” “from,” and “what” appear frequently but do not contribute much to the analysis.  What preprocessing step should they consider?

What is the primary goal of a classification model in machine learning?

A video streaming platform notices a decline in subscriber numbers and wants to take preemptive action.  To do this, they need a model that can predict whether customers will renew or cancel their subscription based on their level of engagement.   What machine learning technique should they use?

A retail store collects feedback from customers by asking them to describe their shopping experience using phrases like “friendly,” “rushed,” or “disorganized.”  This type of data is best classified as:

A hospital records patient information, including names, birthdates, diagnoses, and medications, in an electronic health record (EHR) system that uses a relational database. What type of data is this?