Data Analytics Exam 1 Questions and
Answers Latest Version Graded A+
What is the purpose of normalization in data preprocessing?
✔✔To scale data values to a standard range
How is outlier detection useful in data analysis?
✔✔It helps identify data points that deviate significantly from other observations
What is regression analysis used for in data analytics?
✔✔To predict the value of a dependent variable based on one or more independent variables
What is the purpose of clustering in data analytics?
✔✔To group similar data points together based on shared characteristics
What does a scatter plot typically represent in data analysis?
✔✔The relationship between two continuous variables
1
,What is time series analysis used for in data analytics?
✔✔To analyze data points collected or recorded at successive points in time
What does dimensionality reduction help with in data analysis?
✔✔Reducing the number of features in a dataset while preserving important information
What is the importance of cross-validation in machine learning?
✔✔To evaluate the performance and generalization ability of a model on unseen data
What is a decision tree model used for?
✔✔To make predictions or decisions based on input features
What is the role of SQL in data analytics?
✔✔To query and manipulate data stored in relational databases
What is predictive modeling in data analytics?
✔✔The use of statistical algorithms to forecast future outcomes based on historical data
2
, What is the purpose of a box plot in data visualization?
✔✔To visualize the distribution of data and detect potential outliers
What is the difference between descriptive and inferential statistics?
✔✔Descriptive statistics summarize data, while inferential statistics draw conclusions and make
predictions based on data
What is feature engineering in data analysis?
✔✔The process of creating new features from existing data to improve the performance of
models
What is the significance of data ethics in analytics?
✔✔Ensuring that data is collected, analyzed, and used responsibly and with respect for privacy
What does the term "big data" refer to?
✔✔Large, complex datasets that require advanced processing tools and techniques to analyze
What is the purpose of sentiment analysis in data analytics?
3
Answers Latest Version Graded A+
What is the purpose of normalization in data preprocessing?
✔✔To scale data values to a standard range
How is outlier detection useful in data analysis?
✔✔It helps identify data points that deviate significantly from other observations
What is regression analysis used for in data analytics?
✔✔To predict the value of a dependent variable based on one or more independent variables
What is the purpose of clustering in data analytics?
✔✔To group similar data points together based on shared characteristics
What does a scatter plot typically represent in data analysis?
✔✔The relationship between two continuous variables
1
,What is time series analysis used for in data analytics?
✔✔To analyze data points collected or recorded at successive points in time
What does dimensionality reduction help with in data analysis?
✔✔Reducing the number of features in a dataset while preserving important information
What is the importance of cross-validation in machine learning?
✔✔To evaluate the performance and generalization ability of a model on unseen data
What is a decision tree model used for?
✔✔To make predictions or decisions based on input features
What is the role of SQL in data analytics?
✔✔To query and manipulate data stored in relational databases
What is predictive modeling in data analytics?
✔✔The use of statistical algorithms to forecast future outcomes based on historical data
2
, What is the purpose of a box plot in data visualization?
✔✔To visualize the distribution of data and detect potential outliers
What is the difference between descriptive and inferential statistics?
✔✔Descriptive statistics summarize data, while inferential statistics draw conclusions and make
predictions based on data
What is feature engineering in data analysis?
✔✔The process of creating new features from existing data to improve the performance of
models
What is the significance of data ethics in analytics?
✔✔Ensuring that data is collected, analyzed, and used responsibly and with respect for privacy
What does the term "big data" refer to?
✔✔Large, complex datasets that require advanced processing tools and techniques to analyze
What is the purpose of sentiment analysis in data analytics?
3
