preliminary surveys are conducted because of the following reasons....
1)Allooo Kia dozen chal raha hain..?
2)doodh kia kilo mil raha hai...?
3)kuttoun ki mardam shumari ka lia..?
4)how many people wash their socks daily...?
5)how many people died becaus of excess of 02 in the air..?
I Hope This Might be Enoungh ...w'd love to hear you..TC
Sampling errors are errors in the data collected during the carrying out of quantitative data surveys. They can occur for various reasons, e.g. surveys that were incorrectly filled out. It is generally said that a survey needs to have a margin of error of under 3% to be statistically significant.
Stuff...
primary data is data which has been collected by yourself, which is more reliable and up to date. secondary data has been collected from a secondary source (Other people, business etc.) so it may not be valid or up to date
The data collected does not have to be measurable.
Data has been collected from the Medical Examiners Office records, emergency room statistics, police arrest and vehicular crash data, high school and college substance consumption surveys, and other data related to the availability of prescription drugs.
It is simply one way in which information can be collected.
There are several ways that data can be collected that include interviews and research. Other methods used to collect data include surveys, phone calls, and by direct observation.
From data collected nationally from surveys of several thousand selected addresses. See Below link:
data
Data is the information collected during an experiment
What visual model helps to understand the data collected during an experiment?
data
Sampling errors are errors in the data collected during the carrying out of quantitative data surveys. They can occur for various reasons, e.g. surveys that were incorrectly filled out. It is generally said that a survey needs to have a margin of error of under 3% to be statistically significant.
IT is data
Stuff...
i really dont know
Conclusion . Not sure .