DA0-001 Practice Test practice questions, page 5 of 17, with answer review and explanations.
Question 21
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?
In Germany, the increase in conversion from the new layout was not significant.
In France, the increase in conversion from the new layout was not significant.
In general, users who visit the new website are more likely to make a purchase.
The new layout has the lowest conversion rates in the United Kingdom.
Question 22
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?
Histogram
Pie
Line
Scatter pot
Waterfall
Question 23
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?
394mm
405mm
493mm
504mm
Question 24
Which of the following are reasons to create and maintain a data dictionary? (Choose two.)
To improve data acquisition
To remember specifics about data fields
To specify user groups for databases
To provide continuity through personnel turnover
To confine breaches of PHI data
To reduce processing power requirements
Question 25
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?
The data analyst is not querying the databases correctly.
The databases are recording different events.
The databases are recording the event in different time zones.