A use case summarizes an event and defines one activity.( )
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Ajax may be used to obtain data for a Web form without changing Web pages.( )
Sampling helps accelerate the process by gathering selected data rather than all data for the entire population.( )
Data-gathering bias can be reduced by sampling.( )
When the systems analyst asks an opinion of a permanent feature of the installed information system, the executive interviewed may provide an unbiased evaluation since there is little possibility of changing it. ( )