You may be thinking of 'anomaly'.
Facts, figures, and other evidence collected through observations is called data.
raw data
The information collected from an observation is called data.
first hand data is information that you have collected. Second hand data is information that a different source have collected.
IT is data
Stuff...
Primary data is data that is collected by the researcher. Secondary data is information that has been collected by someone other than the user.
Conclude that you made a mistake in the way you collected the data
Data?
the answer is information
secondary data
data can be collected many different ways, but a survey can be cunducted in a few different ways some of them are: simple random, stratified, block samples stratified simple random