Answer:
This means, they can choose the perfect group or sample for their research and create a specific environment to collect the desired data. The three main ways of collecting primary data is asking, observing and experimenting this target group.
disadvantage and advantage of asking in data gathering
Advantages
(a) Personal Interviews 1. Highest response rate. 2. Allows use of all types of questions.
disadvantage
1. Most expensive. 2. Possibility of influencing respondents. 3. More time taking.
disadvantage and advantage of observing in data gathering
Advantages
several advantages in contrast to controlled and randomized trials such as reduced cost, time adherence, and the ability to evaluate a broad range of subjects.
disadvantage
The money and time required to conduct an observation are often prohibitive.
° Lack of competence of the observer. The lack of competence of the observer may hamper the validity and reliability of observation. ...
° Lack of clarity. ...
° Little control over physical situation. ...
° Unmanageable data. ...
° Possibility of distortion.
disadvantage and advantage of experimenting in data gathering
Advantages
° researcher can have control over variables
° humans perform experiments anyway
Disadvantage
° can produce artificial results
humans perform experiments anyway
° results may only apply to one situation and may be difficult to replicate
Step-by-step explanation:
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