Extracting Information from Data
What is metadata?
Metadata is a set of data that describes and gives information about other data.
What is data compression?
Reduction in the number of bits needed to represent data, used to save transmission time and storage space
What are the 2 characters used in binary?
0's & 1's
A place where data could be stored to be processed?
What is a list
What are examples of data visualizations? Why are they helpful?
graphs, diagrams, textual displays, etc. They are helpful because they make interpretation easier than looking at a bunch of numbers.
What is lossy data compression?
Reducing the number of bits stored/transmitted but only allow reconstruction of aproximation of the orginal data
A binary number is expressed by what base- numeral system?
Base-2
Users can utilize the program to interact with the data to gain insight and knowledge
What is filtering and cleaning data
What are some challenges with analyzing data?
bias, nonuniform data, incomplete data, data sets may need to be combined, etc.
What type of compression guarantees complete reconstruction of orginal data?
Lossless data compression
What is 11010110 in decimal form?
214
A process of using programs to gain insight and knowledge from data
What is combining data sources, clustering data, and classifying data parts?
What type of computing may be required to process large data sets?
parallel computing
Why is data compression important for websites?
Your webpage will load faster
Where are bits (binary digits) stored?
inside electronic circuits called memory cells
The process of finding information and recognizing patterns in data
What is a data filtering system
What is data correlation?
A statistical measure that indicates the extent to which two variables are related or move together in a consistent way
Does compression affect image quality?
Compression can make a file size so small that image quality becomes extremely poor.
What happens if there are not enough bits to represent a given number?
An overflow error
How can spreadsheets be used to analyze trends?
The spreadsheets can show movement and patterns in the data.