IT Specialist : Data Analytics Practice Exam 1. To reduce bias, a teacher needs to grade student assignments without knowing who submitted each assignment. She asks her colleague to replace the name on each assignment with a number and to maintain a private list of the names and their corresponding numbers. After the teacher finishes grading, the colleague replaces each number with the original name. Which process are they using? A. Data Cleaning B. Filtering C. Pseudonymization D. Anonymization 2. Complete the sentences by selecting the correct option from each drop-down list. A. The data element 'Banana' is a ____ variabel. Answer:String. B. The data element 31.20 is a ____ variabel. Answer:Float C. The data element FALSE is a ____ variabel. Answer:Boolean 3. A teddy bear manufacturer recently had an incident where 500 teddy bears were shipped with one extra eye. The company wants to know why the error occurred and begins analyzing data to fulfill this purpose. Which type of analysis will they need to conduct? A. Predictive Analysis B. Descriptive Analysis C. Diagnostic Analysis D. Prescriptive Analysis 4. Move each data type from the list on the left to the correct use for the data type on the right A. Use this data type to store the result of a conditional statement such as 'X != Y' Answer:Boolean B. Use this data type to store text such as a first name 'John' Answer:String C. Use this data type to perform mathematical operations such as 'X + Y' Answer:Numeric 5. A news agency receives the following graph from an outside source. With the hopes of receiving a bonus, a journalist who believes in global warming decides to publish an article that includes this graph immediately. For each statement, select Yes if the statement is true or No if it is not. A. This graph illustrates confirmation bias. Answer:Yes. B. This graph illustrates motivational bias. Answer:Yes C. The graph illustrates anchoring bias. Answer:No 6. An analyst prepares to work with data for her project. She has retrieved the data from a database and is now validating that data. In which phase is the analyst currently working? A. Extract B. Transform C. Load D. Data Collection 7. School clubs raise money during the months of August, September, and October. The clubs create this visualization. For each statement, select Yes if it is true or No if it is false. A. The Football club raised the most money of all the clubs. Answer:Yes B. The Drama club raised less money in October than it did in September. Answer:No C. The Math club raised the same amount of money for all three months. Answer:Yes 8. A teacher wants to know how students' scores relate to the classes' average score on an assignment. Which statistic should she use? A. Standard Deviation B. Mode C. Sum D. Median 9. Which 2 p-values would lead to a rejection of the null hypothesis? (Choose two). A. .02 B. 2.0 C. .002 D. .20 10. You work for a store that sells items online. You are analyzing data to determine which items are left in the cart and remain unpurchased. The sales department has determined a baseline of 15% is acceptable. Anything above 15% requires more analysis to determine what the problem is. The visualization below summarizes the results of the analysis. What conclusion can you derive from the chart below? A. Too many sweaters are left in the cart. B. Shoes are not profitable and should be dropped from the product line. C. T-shirt pricing should be decreased to increase sales. D. Sweaters are priced too high.