Data Science Concepts Worksheet

Which of the following best describes metadata?

• Data collected from multiple sources over time

• The process of making data more accurate

• Data about other data

• A cleaned version of a dataset

What is a key characteristic of citizen science?

• It relies only on professional scientists for data collection

• It excludes public participation due to data privacy

• It uses public contributions to help gather scientific data

• It focuses only on computer science problems

Which of the following is an example of cleaning data?

• Visualizing a bar graph of collected responses

• Changing all instances of "NY" and "New York" to "New York"

• Collecting more responses for a survey

• Adding additional columns to a dataset

What does it mean when there is a correlation between two variables?

• One variable causes the other to occur

• The variables are exactly the same

Which scenario is an example of crowdsourcing?

• A. A company hires a consultant to analyze customer data

• B. A teacher grading student surveys

• C. An app that lets users submit traffic updates from their phones

• D. A robot collecting data from a sensor

How does information differ from raw data?

• A. Information includes personal opinions

• B. Information is data that has been organized and interpreted

• C. Information is less useful than raw data

• D. Information is the unprocessed original content

Which of the following is an example of data bias?

• A dataset where 90% of survey respondents are from one city

• Data that has been converted into a visual chart

• A data table with multiple columns

• A dataset that includes all possible values

What is the purpose of data filtering in a dataset?

• To remove errors from the data

• To highlight patterns using color

• To select only the relevant rows or columns for analysis

• To permanently delete all data

What is the primary goal of data visualization?

• To increase data storage

• To make data more complex

• To simplify the understanding of data

• To hide data from users

Which of the following is a benefit of using open data?

• It restricts data access to a few individuals

• It increases data privacy concerns

• It allows for greater transparency and innovation

• It makes data analysis more difficult