CompTIA DA0-001 Exam (page: 5)
CompTIA Data+
Updated on: 15-Feb-2026

Viewing Page 5 of 41

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?

  1. In Germany, the increase in conversion from the new layout was not significant.
  2. In France, the increase in conversion from the new layout was not significant.
  3. In general, users who visit the new website are more likely to make a purchase.
  4. The new layout has the lowest conversion rates in the United Kingdom.

Answer(s): A



An analyst needs to provide a chart to identify the composition between the categories of the survey response data set:



Which of the following charts would be BEST to use?

  1. Histogram
  2. Pie
  3. Line
  4. Scatter pot
  5. Waterfall

Answer(s): B



Five dogs have the following heights in millimeters:

300, 430, 170, 470, 600

Which of the following is the mean height for the five dogs?

  1. 394mm
  2. 405mm
  3. 493mm
  4. 504mm

Answer(s): A



Which of the following are reasons to create and maintain a data dictionary? (Choose two.)

  1. To improve data acquisition
  2. To remember specifics about data fields
  3. To specify user groups for databases
  4. To provide continuity through personnel turnover
  5. To confine breaches of PHI data
  6. To reduce processing power requirements

Answer(s): A,D



A recurring event is being stored in two databases that are housed in different geographical locations. A data analyst notices the event is being logged three hours earlier in one database than in the other database. Which of the following is the MOST likely cause of the issue?

  1. The data analyst is not querying the databases correctly.
  2. The databases are recording different events.
  3. The databases are recording the event in different time zones.
  4. The second database is logging incorrectly.

Answer(s): C



Viewing Page 5 of 41



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