null
US
Sign In
Sign Up for Free
Sign Up
We have detected that Javascript is not enabled in your browser. The dynamic nature of our site means that Javascript must be enabled to function properly. Please read our
terms and conditions
for more information.
Next up
Copy and Edit
You need to log in to complete this action!
Register for Free
8524188
Data and quality of data
Description
KS4 ICT Mind Map on Data and quality of data, created by Matthew Stentiford on 12/04/2017.
No tags specified
ict
ks4
Mind Map by
Matthew Stentiford
, updated more than 1 year ago
More
Less
Created by
Matthew Stentiford
over 7 years ago
15
0
0
Resource summary
Data and quality of data
Data - raw facts/figures (no meaning)
Data + meaning = information
information + understanding = knowledge
Data can be numbers, words, pictures, videos and sounds
Data goes into a computer and useful information comes out
must be good quality
GIGO - Garbage in Garbage out
Incorrect data goes in = incorrect information comes out
Quality of data
Fit for purpose
Asking for someones religion is NOT fit for purpose
Accurate
incorrect items could be delivered if data isn't accurate
Up to date
Correct address so products can be delivered
Valid
Ordering food in B&Q won't be valid data
Non-biased
Collecting data from a random sample
Data validation
Data needs to have NO ERRORS
Validation spots the errors
Types of errors
Wrongly recorded
Data capture forms designed to minimise errors
entered incorrectly
double keyed or proof read
Could be changed by unauthorised personel
security (passwords)
Corrupted during transmition
encryption
checks data BEFORE processed
Data Verification
Checks data AFTER being processed
validation techniques
Range check
numerical data lies within an acceptable range
1-31 DAYS OF THE MONTH
presence check
is any data missing?
Format check
Data in correct format
Check digit
Calculation creates an extra digit
computer checks that the check digit is correct when data is entered
Show full summary
Hide full summary
Want to create your own
Mind Maps
for
free
with GoConqr?
Learn more
.
Similar
Types and Components of Computer Systems
Jess Peason
Input Devices
Jess Peason
Output Devices
Jess Peason
Networks
Will8324
General ICT Quiz
leahshaw
ICT Revison Flash Cards
Arun Johal
FLAT FILE VS RELATIONAL DATABASE
rosiejones
Online World - Learning Aim A
andysedge
Business Aims and ICT Strategies
scrt
User Interfaces
Skeletor
General ICT Quiz
Jade Fantom
Browse Library