Exercise Data Science

What is one of the initial activities in data science?

• Model building and evaluation

• Data Exploration and preparation

• Statistical analysis

• Machine learning implementation

Why is R used in data science?

• Offers a wide range of libraries for data manipulation and visualization.

• Easy to learn to do simple things.

• Provides powerful machine learning algorithms out of the box.

• Allows seamless integration with big data technologies.

What stages are involved in the data science cycle?

• Collect, Analyze, Interpret

• Visualize, Predict, Evaluate

• Transform, Visualize, Model

• Clean, Store, Analyze

What is qualitative data?

• Data measured in numerical form

• Data that can be quantified and analyzed statistically

• Descriptive information that cannot be quantified, such as opinions or preferences

• Data collected through structured surveys and experiments

In quantitative data analysis, what are examples of ordinal data?

• Temperature in degrees Celsius

• Height in centimeters

• Scores on a Likert scale

• Number of cars in a parking lot

Based on the scenario where Alex uses data from the internet, what classification of data source does Alex fall under?

• Primary

• Secondary

• Tertiary

• Quaternary

In the characteristics of big data, what does velocity refer to?

• Volume of data generated

• Variety of data types

• Veracity of data accuracy

• Speed of generating data

8. What does it mean by computation in Big Data?

• Storing and managing large volumes of data

• Analyzing data to extract meaningful insights

• Processing data using distributed systems and algorithms

• Ensuring the accuracy and reliability of data

When Maria tweets about her school and the data is stored in Big Data, what type of data does Maria's tweet represent?

• Raw Data

• Processed Data

• Volunteered Data

• Structured Data

What principle states that a company should inform customers before using their data?

• Transparency

• Accountability

• Fairness

• Notice