CompTIA Data+365 questions across 37 pages are complete and free, with no account or card.
365 questions in this bank
Free access · progress saved on this device
A stakeholder wants to see daily sales targets organized in a dashboard by country, state, city, and ZIP Code. Which of the following delivery considerations must a data analyst take into account when creating the dashboard?
Answer: B
An analyst is reporting on the average income for a county and is reviewing the following data:
Which of the following is the reason the analyst would need to cleanse the data in this data set?
Answer: A
B. Data outliers In this dataset, the income values vary widely, with Jessica Jones having a significantly higher yearly income compared to the others. This extreme value might be considered an outlier and could skew analysis if not addressed. The analyst might need to cleanse or process the data to handle this outlier, depending on the intended analysis. The other options do not apply here because: A. Data completeness: All entries are present for each row. C. Duplicate data: There are no duplicate entries. D. Missing values: No values are missing.
Source: Adapted from community discussion — stephyfresh13
Which of the following should an analyst do to best summarize the data on a data set?
Answer: B
Which of the following data types must be used when working with variables that require classification into two or more groups before analysis?
Answer: D
An organization would like to add a secondary email field to its customer database in order to enrich the customer profiles. Which of the following data manipulation techniques should the analyst use to add this information?
Answer: C
Which of the following is the best variable format to store a customer's age using the least possible amount of storage data?
Answer: A
An e-commerce company recently tested a new website layout. The website was tested by a test group of customers, and an old website was presented to a control group. The table below shows the percentage of users in each group who made purchases on the websites:
Which of the following conclusions is accurate at a 95% confidence interval?
Answer: A
C. Based on the data in the table, it can be concluded that, in general, users who visit the new website are more likely to make a purchase. This conclusion can be made at a 95% confidence interval, which means that there is a 95% probability that this conclusion is accurate. The other conclusions are not supported by the data in the table. The data does not show a significant increase in conversion from the new layout in Germany or France, and the new layout does not have the lowest conversion rates in the United Kingdom.
Source: Adapted from community discussion — CineFeX
A gambler thinks that a coin is fair and is equally likely to turn up heads or tails when the coin is flipped. Which of the following tests should the gambler use to test this hypothesis?
Answer: B
Which of the following is most likely to be used as a data-mining ETL tool?
Answer: D
A business unit made the following modification to the values in a table:
Which of the following data quality dimensions was applied in this scenario?
Answer: B
Keyboard:J Kmove between questionsA–Dselect an answerRshow or hide the answer← →change page
DA0-001 practice, question 111. 365 questions available.
Version 1.0.0. How we source questions