WGU D204 Pre Assessment Questions and Answers

1. Which activity does an analyst perform in the discovery phase of the data analytics life cycle?: Identifying business needs 2. In which phase of the data analytics life cycle does an analyst build a histogram?: Data exploration 3. 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: Exploratory data analysis 4. An analyst has been tasked with defining data columns that could contain null values. Which activity of the data acquisition phase is represented?: De- tecting missing values 5. Which activity in the data analytics life cycle occurs during the data acqui- sition phase and requires the most time and effort from the data analyst?: - Cleaning data 6. What might be developed by data analysts when acquiring data from a data warehouse?: The SQL queries of data within the tables 1 / 5 7. What can be identified using a box plot?: Interquartile range 8. What will be a consequence of poor attention to detail during the data exploration phase?: The analyst will lack insight into the structure of the data set. 9. Which aspect of data exploration occurs when an analyst writes code to compile a bar graph of dog food sales per month?: Verification through visual- ization 10. An oil company uses robots and sensors to detect how pipeline corrosion changes over time. The collected data is then used in a predictive model that estimates when a pipe should