DA0-001 · Question #314
Which of the following should an analyst do to best summarize the data on a data set?
The correct answer is B. Aggregation. To effectively summarize a dataset, an analyst should use aggregation, which involves combining data into meaningful groups and calculating summary statistics. This process helps to extract key insights and reduce the dataset to a more manageable overview.
Question
Which of the following should an analyst do to best summarize the data on a data set?
Options
- AFiltering
- BAggregation
- CSorting
- DConcatenation
How the community answered
(66 responses)- A2% (1)
- B89% (59)
- C2% (1)
- D8% (5)
Why each option
To effectively summarize a dataset, an analyst should use aggregation, which involves combining data into meaningful groups and calculating summary statistics. This process helps to extract key insights and reduce the dataset to a more manageable overview.
Filtering selects a subset of data based on specific criteria but does not inherently summarize the remaining data.
Aggregation involves calculating summary statistics (e.g., sum, average, count, min, max) for groups of data, which is the primary method for summarizing a dataset and gaining high-level insights. This process condenses large amounts of raw data into more understandable and actionable forms.
Sorting arranges data in a particular order but does not reduce or summarize the dataset itself.
Concatenation combines data strings or datasets end-to-end, which is a data manipulation technique, not a summarization technique.
Concept tested: Data summarization - Aggregation
Source: https://learn.microsoft.com/sql/t-sql/queries/aggregate-functions-transact-sql
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