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The CompTIA Data+ Certification Exam certification exam consists of 90 multiple-choice questions and is conducted in a time frame of 90 minutes. DA0-001 exam is designed to test an individual's knowledge and skillset in data management. DA0-001 Exam covers topics such as data storage, data analysis, data governance, data security, and data quality. DA0-001 exam is available in multiple languages, making it accessible to individuals across the globe.
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CompTIA DA0-001 exam covers a variety of topics related to data, including data management, data analysis, data visualization, and data security. Professionals who pass DA0-001 exam will be able to demonstrate their knowledge of these topics and their ability to work with data in a professional setting. CompTIA Data+ Certification Exam certification is relevant for professionals in a variety of fields, including business, healthcare, finance, and government.
To earn the CompTIA DA0-001 Certification, candidates must pass a comprehensive exam that covers a wide range of topics related to data management. DA0-001 exam consists of 90 multiple-choice questions and has a time limit of 90 minutes. Candidates must achieve a passing score of 720 on a scale of 100-900 to earn the certification. CompTIA Data+ Certification Exam Sample Questions (Q168-Q173):NEW QUESTION # 168
An analyst wants to determine whether a relationship between an individual's age and voting preferences exists. Which of the following is the best statistical method for the analyst to use?
A. F-test
B. Chi-squared
C. Z-score
D. P-value
Answer: B
Explanation:
The Chi-squared test is used to analyze relationships between two categorical variables. In this case, age groups and voting preferences are both categorical variables, making chi-squared the most appropriate test.
Reference: CompTIA Data+ DA0-001 Official Guide
NEW QUESTION # 169
Which one of the following would not normally be considered a summary statistic?
A. z-score.
B. Standard deviation.
C. Variance.
D. Mean.
Answer: A
Explanation:
Explanation:
Simply put, a z-score (also called a standard score) gives you an idea of how far from the mean a data point is. But more technically it's a measure of how many standard deviations below or above the population mean a raw score is. A z-score can be placed on a normal distribution curve.
NEW QUESTION # 170
A marketing analytics team received customer transaction data from two different sources. The data is complete and accurate; however, the field names appear to be inconsistent. Given the following tables:
Which of the following is considered best practice if the team wants to consolidate the files and conduct further analysis?
A. Standardize the field names.
B. Overwrite the field names in one of the tables.
C. Recode the data values.
D. Edit the field names in the data dictionary.
Answer: A
NEW QUESTION # 171
Which of the following data manipulation techniques is an example of a logical function?
A. AGGREGATE
B. BOOLEAN
C. WHERE
D. IF
Answer: D
Explanation:
This is because an IF function is a type of logical function that returns a value based on a condition or a set of conditions. An IF function can be used to manipulate data by applying different actions or calculations depending on whether the condition is true or false. For example, an IF function in Excel that can achieve this is:
=IF (condition, value_if_true, value_if_false)
The other data manipulation techniques are not examples of logical functions. Here is why:
* WHERE is a type of clause that filters data based on a condition or a set of conditions. A WHERE clause can be used to manipulate data by selecting only the rows that satisfy the condition(s). For example, a WHERE clause in SQL that can achieve this is:
* AGGREGATE is a type of function that performs a calculation on a group of values, such as sum, average, count, etc. An AGGREGATE function can be used to manipulate data by summarizing or aggregating the values in a column or a table. For example, an AGGREGATE function in SQL that can achieve this is:
* BOOLEAN is a type of data type that represents two possible values: true or false. A BOOLEAN data type can be used to manipulate data by storing or returning logical values based on a condition or a set of conditions. For example, a BOOLEAN data type in Python that can achieve this is:
NEW QUESTION # 172
An analyst is preparing a report that contains weather data. The temperatures are shown in Fahrenheit. but they must be reported in Celsius. Which of the following should the analyst do to fix this issue?
A. Aggregate the data.
B. Rescale the data.
C. Standardize the data.
D. Normalize the data.
Answer: B
Explanation:
The analyst should rescale the data to fix this issue. Rescaling is a process of transforming data from one scale to another, such as changing the units of measurement. In this case, the analyst needs to rescale the temperatures from Fahrenheit to Celsius, which are two different scales for measuring temperature. To do this, the analyst can use the following formula:
Celsius = (Fahrenheit - 32) * 5/9
This formula converts each temperature value from Fahrenheit to Celsius by subtracting 32 and multiplying by 5/9. For example, if the temperature is 68¡ãF, the rescaled value in Celsius is:
Celsius = (68 - 32) * 5/9 Celsius = 20¡ãC
Rescaling the data can help the analyst to report the temperatures in a consistent and accurate way, and to avoid any confusion or errors that may arise from using different scales. Rescaling can also make the data more comparable and compatible with other data sources or standards that use the same scale12.
