IT Specialist : Data Analytics Practice Exam 1. A scientist has data that has not yet been cleaned or analyzed. Which type of data do they have? A. Information B. Test Data C. Experimental Data D. Raw Data 2. You have two classes taking an exam, and you want to know if there was a difference in overall exam scores between each class. Which procedure should you run? A. Compare the mode of the first half of students against the second half of students B. Group scores by classroom and compute the average exam score of each group C. Compute the correlation between the scores of one classroom against the scores of the other classroom D. Merge exam scores from all students of both classrooms together and divide by two 3. You are working as an artificial intelligence (AI) programmer. You create logic that instructs a machine on how to learn on its own. Which type of logic did you create? A. Algorithm B. Design pattern C. Data set D. Test case 4. Answer each question by selecting the correct option from each drop-down list. A. Which data that contains type should you use to store a product's description| multiple words or values and spaces? Answer:String. B. Which data type should you use to store the quantity purchased if you want to perform calculations on the data? Answer:Numeric C. Which data type is the result of a conditional expression? Answer:Boolean 5. A financial analyst wants to show how a particular stock's price changed monthly over two years. How can they effectively display this information? A. Line Chart B. Area Chart C. Tree Map D. Pie Chart 6. You are studying the number of hours a typical student spends in school-related clubs. You survey members of all clubs on campus. Which type of bias may affect your interpretation of the data? A. Anchoring bias B. Confirmation bias C. Sampling bias D. Motivational bias 7. What are two reasons data analysts would use artificial intelligence when working with data? (Choose 2.) A. To make predictions and recommendations based on existing data B. To decide which business data to collect C. To analyze large quantities of data faster than humans D. To cleanse and verify data 8. Move each type of data analysis from the list on the left to the correct definition on the right. A. Using current and historical data to identify trends and relationships. Answer:Descriptive analytics. B. Using data to determine the causes of trends and correlations between variables. Answer:Diagnostic analytics C. Using historical data to forecast trends and events. Answer:Predictive analytics D. Using data to determine what actions should be taken to achieve a goal. Answer:Prescriptive analytics 9. You have the following data: Household 1 2 3 4 5 6 7 Number of Televisions 4 2 5 2 2 3 3 You need to calculate statistics regarding the number of televisions. Move the appropriate values from the list on the left to the correct functions on the right. You may use each value once, more than once, or not at all. A. COUNT Answer: 7 B. MODE Answer: 2 C. MAX Answer: 5 10. Which term describes the process of viewing progressively more detailed views of information? A. Data Cleansing B. Data Aggregation C. Data Drilling D. Regression Analysis