D204 Pre Assessment Questions and Answers 100% Solved

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D204 Pre Assessment Questions and Answers 100% Solved Which activity does an analyst perform in the discovery phase of the data analytics life cycle? ✔✔identifying business needs In which phas... e of the data analytics life cycle does the analyst build a histogram? ✔✔data exploration 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 An analyst has been tasked with defining data columns that could contain null values. Which activity of the data acquisitions phase is represented? ✔✔detecting missing values 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? ✔✔cleaning data What might be developed by data analysts when acquiring data from a data warehouse? ✔✔the SQL queries of data within the tables What can be identified using a box plot? ✔✔interquartile range What will be the consequence of poor attention to detail during the data exploration phase? ✔✔The analyst will lack insight into the structure of the data set Which aspect of data exploration occurs when an analyst writes code to compile a bar graph of dog food sales per month? ✔✔verification through visualization 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 be replaced. How does the predictive model serve this oil company? ✔✔to minimize interruptions from maintenance shutdowns During which phase in the data analytics life cycle would a churn analysis be performed? ✔✔predictive analysis Which mistake is commonly made during the predictive analytics phase? ✔✔The model is developed before the research question is known Why might a data analyst resample a data set with replacement data in a data mining project? ✔✔too little data for training and testing tool sets A data analyst has identified combinations of sales t [Show More]

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