Data Analytics

Which of the following is a primary difference between BI (Business Intelligence) and Data Science?

• BI focuses on prediction, while Data Science focuses on historical analysis

• BI uses past data for decision-making, while Data Science emphasizes future predictions and modeling.

• BI and Data Science are identical in approach and goals

• Data Science is only concerned with structured data

In which phase of the Data Analytics Lifecycle is data cleaned and transformed for analysis?

• Data Preparation Phase

• Discovery Phase

• Model Building Phase

• Operationalization

What is the primary objective of Exploratory Data Analysis (EDA)?

• To finalize the data model

• To make predictions

• To summarize data characteristics through visualization and statistics

• To clean and preprocess the data

Which statistical test is used to compare the means of two independent groups?

• Wilcoxon Rank-Sum Test

• ANOVA

• Hypothesis Testing

• t-test

What does ARIMA stand for in Time Series Analysis?

• Auto-Regressive Integrated Moving Analysis

• Auto-Regressive Integrated Moving Average

• Analysis of Recurrent Integrated Moving Averages

• Auto-Recursive Integrated Moving Analysis

In Text Analysis, what does TF-IDF primarily measure?

• The length of a document

• The importance of a term in a document relative to a corpus

• The frequency of stopwords in a document

• Sentiment within a document

Which of the following is NOT a key component of the final deliverable in an analytics project?

• Model Description

• Code Documentation

• Personal Information of Stakeholders

• Main Findings Supported by Data

What is the primary purpose of data visualization in analytics projects?

• To replace statistical analysis

• To represent complex data insights in an easily understandable format

• To clean and preprocess raw data

• To test hypotheses

What is the process of breaking text into smaller units such as words or phrases called?

• Stemming

• Tokenization

• Sentiment Analysis

• Feature Extraction

Which of the following techniques is primarily used in recommender systems?

• Web Scraping

• Collaborative Filtering

• Sentiment Analysis

• ARIMA Modeling