0
Still curious? Ask our experts.
Chat with our AI personalities
Jordan
Ross
SteveAdd your answer:
Earn +20 pts
Why is the second survey more believable than the first?
It is because the sample size for the second survey was larger.
You'll need to select a sample that represents a larger group when you're conducting?
Survey research
What is a self-selected survey?
A self-selected sample survey is when the surveyer choses who he or she wants to ask the survey question to. So, the people surveyed are not random at all. One problem with this is that the surveyer can easily manipulate results by asking a group of people specifically to get a certain result. For example, if I wanted to do a survey about abortion, and I wanted the results to be in favor of my liberal views, I might only survey people in a liberal coffee shop in Seattle. This is a self-selected survey.
Why does sampling error occur?
The list is very long! In sampling error, I include all aspects of data collection. Samples (and not the full population) are taken in observational and experimental studies. The sample size may be a problem. In some cases, it may impossible to correct. If I am studying some rare occurrence, say hurricanes with winds over 280 mph or incidences of mad cow disease, the number of observations is fixed. Other times, there is inadequate time or budget to sample adequately. Sampling error can occur because of the way a sample is taken. This is very true of marketing surveys, which may be taken at time when they are more likely to survey one segment of the population. Or they are taken in one location that is not representative of the general population. A voluntary survey, or convenience survey may also be biased. The manner in which questions are posed, can introduce bias. Inadequate quality checking also contributes to sampling error. This is true whether the data collection is done by humans, or instruments, such as a testing laboratory. If a particular instrument is improperly calibrated, all measurements can be questionable. Finally, there are many means of purposely introducing bias into collected data in order to show "factual evidence" of preconceived ideas. The time frame or location where data is to be collected may be done to build in a particular bias. You will probably find more examples by searching the internet.
Which survey is most likely affected by bias?
A convenience survey or a self-selection survey is most likely to be affected by bias
