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CompTIA DA0-001 Certification Exam is a challenging test that requires dedication and preparation. DA0-001 exam consists of 90 multiple-choice questions that candidates need to complete within 90 minutes. Candidates need to score at least 720 out of 900 to pass the exam. CompTIA Data+ Certification Exam certification is valid for three years, and candidates need to renew it through continuing education or retaking the exam. Overall, the CompTIA DA0-001 certification exam is an excellent way for professionals to demonstrate their expertise in data management and advance their careers.

CompTIA Data+ Certification exam is ideal for professionals who are interested in data analytics, including data analysts, data scientists, business analysts, and database administrators. CompTIA Data+ Certification Exam certification can help professionals gain a competitive edge in the job market as it validates their expertise in data analytics.

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CompTIA Data+ Certification Exam Sample Questions (Q397-Q402):

NEW QUESTION # 397
Which of the following is a non-parametric test?

A. One-sample t-test
B. Spearman's rank correlation
C. Two-way ANOVA
D. Correlation coefficient

Answer: B

Explanation:
Explanation
The correct answer is D. Spearman's rank correlation.
Spearman's rank correlation is a non-parametric test that measures the strength and direction of the relationship between two variables that are ranked (ordinal) or continuous. Spearman's rank correlation does not assume that the data follows a normal distribution or that the variables are linearly related. Spearman's rank correlation is based on the ranks of the data rather than the actual values12 A; One-sample t-test is not correct, because it is a parametric test that compares the mean of a sample to a specified value. One-sample t-test assumes that the data follows a normal distribution and has a known population standard deviation34 B: Two-way ANOVA is not correct, because it is a parametric test that compares the means of two or more groups that are influenced by two independent factors. Two-way ANOVA assumes that the data follows a normal distribution, has homogeneous variances, and has independent observations.
C: Correlation coefficient is not correct, because it is a parametric test that measures the strength and direction of the linear relationship between two continuous variables. Correlation coefficient assumes that the data follows a bivariate normal distribution and has no outliers.

NEW QUESTION # 398
A data analyst received a large amount of third-party data that needs to be joined with in-house data files. After the data is joined, the analyst notices three columns all contain dates. Which of the following should the analyst do to maintain data consistency?

A. Separate the columns into a table and merge.
B. Merge all date columns and unify the format.
C. Impute all three date columns and then merge.
D. Append all date columns and parse the strings.

Answer: B

Explanation:
When dealing with multiple date columns from different data sources, it's crucial to ensure consistency and accuracy in the dataset. The best practice is to merge the date columns and standardize the date format across the entire dataset. This approach helps maintain data integrity, simplifies analysis, and avoids confusion that could arise from having multiple date formats. Unifying the date format is particularly important when the data will be used for time series analysis or when dates are key to joining with other datasets.
Reference:
Best practices in data merging emphasize the importance of a single point of reference and the need to avoid data loss or damage to individual data structures1.
Power BI guides suggest that merging columns should be done carefully to maintain data integrity and avoid errors and inconsistencies2.
Oracle Blogs highlight the need for a consistent number of columns among data sources when combining data with unions3.
Excel tutorials recommend organizing data before merging and using formulas for complex merges4.
An Excel guide on merging date and time columns advises employing functions to ensure seamless handling of non-date values5.

NEW QUESTION # 399
A sales team wants visibility of current sales numbers, pipeline, and team performance. The team would also like to see calculations of individuals' earned commissions and projected commissions based on sales, but they want that information to be kept confidential. Which of the following would be the BEST way to provide this visibility?

A. Create a dashboard displaying a data refresh date so users know the current sales numbers and configure permissions to control access.
B. Create a dashboard with filters for the overall team, individuals, and management. Users can filter to see the data they want.
C. Create a dashboard with views for team, individuals, and management. Configure permissions to control access.
D. Create a dashboard for sales numbers, pipeline, and team and individual performance for the management team.

Answer: D

NEW QUESTION # 400
Refer to the exhibit.

Which of the following summary statements upholds integrity in data reporting?

A. While Strategy 2 does not result in the highest sales of Product D. over all products it appears to be the most effective.
B. Product D should be promoted more than the other products in all strategies.
C. Sales are approximately equal for Product A and Product B across all strategies.
D. Strategy 4 provides the best sales in comparison to other strategies.

Answer: A

Explanation:
Answe r: C . While Strategy 2 does not result in the highest sales of Product D. over all products it A summary statement that upholds integrity in data reporting should be accurate, unbiased, and supported by evidence. Option C is the only statement that meets these criteria, as it reflects the data shown in the bar graph without exaggerating or distorting it. Option C also acknowledges the limitation of the statement by using the word "appears", which indicates that there may be other factors or variables that affect the sales performance.
Option A is inaccurate, as sales are not approximately equal for Product A and Product B across all strategies. Product A has higher sales than Product B in strategies 1, 3, and 5, while Product B has higher sales than Product A in strategies 2 and 4.
Option B is biased, as it does not consider the sales of different products in each strategy. Strategy 4 provides the best sales for Product B, but not for the other products. Strategy 5 has the highest total sales across all products, as shown by the black line graph.
Option D is unsupported by evidence, as it does not explain why Product D should be promoted more than the other products in all strategies. Product D has the lowest sales among all products in strategies 1, 3, and 4, and only slightly higher sales than Product C in strategies 2 and 5.

NEW QUESTION # 401
Which of the following can be used to translate data into another form so it can only be read by a user who has a key or a password?

A. Data encryption.
B. Data masking.
C. Data transmission.
D. Data protection.

Answer: A

NEW QUESTION # 402
......

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