Unit 1 Reasoning with Data

What is the ultimate goal of statistics?

• To translate data into knowledge

• To create graphs

• To collect data

• To conduct surveys

Which of the following is a type of qualitative variable?

• Height

• Age

• Weight

• Gender

What does PPDAC stand for in the data science process?

• Problem, Plan, Data, Analysis, Conclusion

• Plan, Problem, Data, Analysis, Conclusion

• Problem, Data, Plan, Analysis, Conclusion

• Prepare, Plan, Problem, Analysis, Conclusion

What type of data is collected firsthand by the researcher?

• Secondary data

• Tertiary data

• Primary data

• Quantitative data

Which of the following is an example of a dependent variable?

• Test scores

• Time spent studying

• Age of students

• Number of classes attended

What is the main focus of descriptive statistics?

• Designing studies

• Summarizing and organizing data

• Making predictions about a population

• Analyzing data for trends

Which of the following is NOT a method of collecting primary data?

• Interviews

• Existing records

• Surveys

• Observations

What is a parameter in statistics?

• A method of data collection

• A numerical description of a sample characteristic

• A numerical description of a population characteristic

• A type of variable

Which of the following is an example of a continuous quantitative variable?

• Shoe sizes

• Number of cars in a parking lot

• Height of students

• Number of students in a class

What is the first step in the PPDAC cycle?

• Plan

• Data

• Problem

• Analysis