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CompTIA Data+ Certification Exam Sample Questions (Q113-Q118):
NEW QUESTION # 113
Which of the following data sampling methods involves dividing a population into subgroups by similar characteristics?
- A. Simple random
- B. Systematic
- C. Stratified
- D. Convenience
Answer: C
NEW QUESTION # 114
Jenny wants to study the academic performance of undergraduate sophomores and wants to determine the average grade point average at different points during an academic year.
What best describes the data set she needs?
- A. Variable.
- B. Observation.
- C. Population.
- D. Sample.
Answer: D
Explanation:
Correct answer A. Sample.
Jenny does not have data for the entire population of all undergraduate sophomores. While a specific grade point average is an observation of variable, jenny needs sample data.
NEW QUESTION # 115
Harry is looking at home sales prices in single zip code and notices that one home sold for $940,394 when the average selling price of similar homes is $210,420.
What type of data does the $940,394 sales price represent?
Choose the best answer.
- A. Data outlier.
- B. Redundant data.
- C. Duplicate data.
- D. Invalid data.
Answer: A
Explanation:
Correct answer B. Data outlier.
Since the value is more than four times the average, the $940,394 value is an outlier.
NEW QUESTION # 116
Which of the following is a process that is used during data integration to collect, blend, and load data?
- A. BI
- B. ETL
- C. MDM
- D. OLTP
Answer: B
NEW QUESTION # 117
Alex wants to use data from his corporate sale, CRM, and shipping systems to try and predict future sales.
Which of the following systems is the most appropriate?
Choose the best answer.
- A. Data mart.
- B. OLAP.
- C. OLTP.
- D. Data Warehouse.
Answer: D
Explanation:
Correct answer: C. Data Warehouse.
Data warehouse bring together data from multiple systems used by an organization.
A data mart is too narrow, as Alex needs data from across multiple divisions.
OLAP is a broad term of analytical processing, and OLTP systems are transactional and not ideal for this task.
NEW QUESTION # 118
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