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Which of the following activities is an example of gathering data by observation?

A. Using a database to look up the number of products returned each
week
B. Conducting a survey of people who took a training course
C. Reading product features in several suppliers’ online catalogs
D. Measuring how many parts workers assemble in an hour

User Victorino
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From the given options, the activity which exemplifies gathering data by observation is option D: Measuring how many parts workers assemble in an hour. This is the best answer as it uses senses to observe people in naturally occurring situation — according to the definition of observation as a data collection method.
User Tomas Jacobsen
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