WGU D204 Practice Exam Questions and Answers Updated 2024/2025 Graded A+.

WGU D204 Practice Exam Questions and Answers Updated 2024/2025 Graded A+. Data Exploration In which phase of the data analytics life cycle does an analyst build a histogram? a. Data acquisition b. Data exploration c. Discovery d. Predictive modeling Exploratory data analysis An analyst applies a statistical formula to obtain the average temperature for a city over the last 50 years. Which phase of the data analytics life cycle is represented by this activity? a. Data acquisition b. Exploratory data analysis c. predictive modeling d. Data reporting Detecting missing values An analyst has been tasked with defining data columns that could contain null values. Which activity of the data acquisition phase is represented? a. collecting data b. disqualifying data sources WGU D204 Practice Exam Questions and Answers Updated 2024/2025 Scored A+ c. detecting missing values d. transforming improperly formatted text Cleaning Data Which activity in the data analytics life cycle occurs during the data acquisition phase and requires the most time and effort from the data analyst? a. selecting the data sources b. importing data into a database c. cleaning data defining goals The SQL queries of data within the tables What might be developed by data analysts when acquiring data from a data warehouse? a.The procedures for extracting files from the data warehouse b. The procedures for updating tables in the data warehouse c. The relational structure of tables d. The SQL queries of data within the tables Interquartile range What can be identified using a box plot? a. frequency b. correlation c. interquartile range d. mean The analyst will lack insight into the structure of the data set. What will be a consequence of poor attention to detail during the data exploration phase? a. Not enough variables will be considered in the analysis. b. The outcome of the analysis will be misaligned to business needs. c. The analyst will lack insight into the structure of the data set. d. The model will be built using the wrong data set. Verification through visualization Which aspect of data exploration occurs when an analyst writes code to compile a bar graph of dog food sales per month? a. Performance of a correlation analysis b. Analysis of data anomalies c. Verification through visualization d. Determination of variabilities To minimize interruptions from maintenance shutdowns How does the predictive model serve this oil company? a. To minimize interruptions from maintenance shutdowns b. To minimize the need for workforce safety training c. To improve compliance with pipeline construction standards d. To improve compliance with pipeline disposal standards predictive analysis During which phase in the data analytics life cycle would a churn analysis be performed? a. data cleaning b. data acquisition c. predictive analysis d. representation and reporting The model is developed before the research question is known. Which mistake is commonly made during the predictive analytics phase? a. The data are separated into different sets. b. The variables are separated into response and independent variables. c. The data are prepared before the model is developed. d. The model is developed before the research question is known. Too little data for training and testing data sets Why might a data analyst resample a data set with replacement data in a data mining project? a. Misidentification of causation due to correlation b. Wrong variables chosen for analyzation c. Too little data for training and testing data sets d. Skewed data resulting from outliers data mining A data analyst has identified combinations of sales transactions that frequently occur together in data over the past 5 years. Which phase of the data analytics life cycle is represented by this analysis? a. data acquisition b. representation and reporting c. data mining d. predictive modeling Data mining An analyst realizes that the data set has been reduced significantly, resulting in sample sizes that are too small. In which phase of the data analytics life cycle did this likely occur? a. data exploration b. data modeling c. data mining d. data discovery Excluding unrelated data What strategy will contribute to effective data representation and reporting? a. Creating a new training data set b. Selecting data for a prediction model c. Excluding unrelated data d. Extracting data from source repositories 1. Provide actionable insights that can inform decision-making 2. Provide the conclusions from the analysis in an engaging manner What are two purposes of the reporting phase of the data analytics life cycle? a. Provide the conclusions from the analysis in an engaging manner b. Provide a tool for decision-makers to import and analyze more data c. Provide actionable insights that can inform decision-making d. Provide an automated way for decision-makers to test their own models Data reporting During which phase of the data analytics life cycle does an analyst create a story to report data? a. data acquisition b. data mining c. data reporting d. data cleaning Maintain data on the IT infrastructure What is a common duty of a database administrator? a. Set project timelines, milestones, and goals b. Acquire funding for data analytics projects c. Maintain data on the IT infrastructure d. Define business needs at the onset of a project regulatory body What is an example of an external stakeholder for a data analytics project? a. president/ceo b. project manager c. regulatory body d. data analyst's supervisor project sponsors Which party has the primary vision for a data analytics project and brings resources to complete it? a. project sponsors b. project managers c. customers d. data analysts Minimum time to complete dependent tasks What does the critical path represent in data analytics project management? a. Minimum time to complete independent tasks b. Maximum time to complete independent tasks c. Minimum time to complete dependent tasks d. Maximum time to complete dependent tasks Expand the team with experienced staff A data analytics project manager has been asked to complete a project on a very short timeline. Which action is likely to yield positive results? a. Outsource the skilled work to an unproven vendor b. Expand the team with experienced staff c. Require current team to work overtime d. Accept lowered quality standards schedule Which type of project management problem occurs when a data mining task has started but a data acquisition task has not been completed? a. scope b. schedule c. procedure d. cost By using tools that provide a team-based collaboration space How can an organization improve interprofessional communication among team members? a. By setting work priorities for team members b. By requiring weekly updates on project deadlines c. By using tools that provide a team-based collaboration space d. By ensuring employees can recite the desired outcomes Send an email to the team member's manager A data analyst needs to contact a specific member of the database administration team. Which method should be used to discover the person's email address? a. Ask the project's customers b. Ask the project's sponsors c. Send an email to project stakeholders d. Send an email to the team member's manager real-time messaging Which feature is commonly found in collaboration tools like Jira, Slack, Teams, and PivotalTracker? a. real-time messaging b. multivariate analysis c. equation editor d. source code management