What is the primary purpose of data visualization?
Data visualization helps to represent data in graphical formats (e.g., charts, graphs) to identify trends, patterns, and insights. This makes complex data easier to understand and analyze, aiding in decision-making.
Which of the following best describes the concept of a "data structure" in computer science?
A data structure is a way of organizing and storing data in a computer so that it can be accessed and modified efficiently. Common examples include arrays, linked lists, and hash tables.
What does "big data" refer to in the context of data analysis?
Big data refers to datasets that are too large or complex to be processed by traditional data processing tools. These datasets require specialized software and techniques for storage, analysis, and interpretation.
In the context of analyzing data, what is the purpose of statistical measures like mean, median, and standard deviation?
Statistical measures such as the mean (average), median (middle value), and standard deviation (measure of spread) are used to summarize and understand the characteristics of data. They help analysts identify central trends and variability in a dataset.
Which of the following is an example of a data analysis technique used to find relationships between variables?
Regression analysis is a statistical technique used to analyze the relationship between variables. It helps identify correlations, such as how one variable may predict or affect another, which is valuable in making data-driven decisions.