D204 Preassessment
Which activity does an analyst perform in the discovery phase of the data analytics life cycle? a. Collecting Data b. Cleaning Data c. Identifying outliers d. Identifying business needs Identifying business needs 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 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? a. Data acquisition b. Exploratory data analysis c. predictive modeling d. Data reporting Exploratory data analysis 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 c. detecting missing values d. transforming improperly formatted text Detecting missing values
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