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CompTIA Data+ Certification Exam Sample Questions (Q394-Q399):

NEW QUESTION # 394
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


NEW QUESTION # 395
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?

Answer: D

Explanation:
A pie chart is the best choice to show the composition between the categories of the survey response data set.
A pie chart represents the whole with a circle, divided by slices into parts. Each slice shows the relative size of each category as a percentage of the total. A pie chart is useful when the categories are mutually exclusive and add up to 100%. The table shows the favorite color and the number of responses for each color, which can be easily converted into percentages. A pie chart can show how each color contributes to the total number of responses.
Option A is incorrect because a histogram is used to show how data points are distributed along a numerical scale. The survey response data set is not numerical, but categorical.
Option C is incorrect because a line chart is used to show trends or changes over time. The survey response data set does not have a time dimension.
Option D is incorrect because a scatter plot is used to show the relationship between two numerical variables.
The survey response data set does not have two numerical variables.
Option E is incorrect because a waterfall chart is used to show how an initial value is increased or decreased by a series of intermediate values. The survey response data set does not have an initial value or intermediate values.
References:
* How to Choose the Right Chart for Your Data - Infogram
* How to Choose the Right Data Visualization | Tutorial by Chartio
* Find the Best Visualizations for Your Metrics - The Data School
* How to choose the best chart or graph for your data


NEW QUESTION # 396
Randy scored 76 on a math test, Katie scored 86 on a science test, Ralph scored 80 on a history test, and Jean scored 80 on an English test. The table below contains the mean and standard deviation of the scores for each of the courses:

Using this information, which of the following students had the BEST score?

Answer: C

Explanation:
To compare the students' scores, we need to standardize them by using the z-score formula, which is:
z = (x - μ) / σ
where x is the raw score, μ is the mean, and σ is the standard deviation. The z-score tells us how many standard deviations a score is above or below the mean. A higher z-score means a better score relative to the average.
Using the table, we can calculate the z-scores for each student as follows:
Randy: z = (76 - 70) / 2 = 3 Katie: z = (86 - 80) / 3 = 2 Ralph: z = (80 - 75) / 2 = 2.5 Jean: z = (80 - 90) / 1 = -10 The student with the highest z-score is Randy, with a z-score of 3. This means that Randy scored 3 standard deviations above the mean in math, which is the best performance among the four students. Therefore, the correct answer is A.


NEW QUESTION # 397
Which of the following defines the policies and procedures for managing the master data?

Answer: D

Explanation:
Data governance encompasses the overall management of data availability, usability, integrity, and security within an organization. It involves establishing policies and procedures to ensure that data is managed effectively and consistently across the organization.
Option A:Data administration
* Rationale:Data administration focuses on the technical aspects of managing data assets, including database management and maintenance. While important, it does not encompass the broader policy- making scope of data governance.
Option B:Data stewardship
* Rationale:Data stewardship involves overseeing the lifecycle of data, ensuring its quality and proper usage. Stewards implement the policies set forth by data governance but do not define those policies themselves.
Option C:Data ownership
* Rationale:Data ownership assigns responsibility for specific data assets to individuals or departments.
Owners are accountable for the data but do not establish the overarching policies and procedures.
Option D:Data governance
* Rationale:Data governance is the framework that defines the policies and procedures for managing master data, ensuring consistency, quality, and protection across the organization.
Reference:The CompTIA Data+ Certification Exam Objectives highlight the importance of data governance in summarizing key concepts related to data management and policy formulation.
partners.comptia.org


NEW QUESTION # 398
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: D


NEW QUESTION # 399
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