Data Analytics Practice Exam 8

IT Specialist : Data Analytics Practice Exam 1. The mainframe computer at the weather station has been programmed to automatically develop a future weather pattern based on past weather patterns. Which type of machine learning is this? A. Unsupervised B. Reinforced C. Supervised D. Semi-supervised 2. For each statement, select Yes if it is an example of artificial intelligence or No if it is not. A. A soda company launches a new flavor that combines two existing flavors based on data collected at soda machines. Answer:NO. B. Your phone recognizes your face and unlocks. Answer:YES C. When you write an email message, the program offers suggestions to complete your sentences. Answer:YES 3. For each statement about data, select Yes if it is true or No if it is false. A. A single item on a sales receipt is considered data. Answer:YES B. When production times are analyzed and used to locate bottlenecks in a process, the collection of interpreted production times is data Answer:NO C. When the current temperature is used with historical data to determine weather trends, the current temperature is data. Answer:NO 4. Which two file segments are delimited files? (Choose 2.) A. Exercise August 1|Weights Arms Run|40 B. Exercise = ["August 1", "Weights", "Arms","Run",40] C. Exercise, August 1, Weights, Arms, Run, 40 D. {"exercise":[{"Date":"August 1","Strength":"Weights", "Focus":"Arms", "Cardio":"Run", "Duration":"40"}]} 5. You need to describe the basic data structures used in data analytics. Complete the paragraph by selecting the correct option from each drop-down list. A (a)_____ contains about a single attribute for a collection of data. A (b)_____ contains values for multiple attributes of a single data item. A (c)_____ contains multiple data items and attributes. Answer: a. Column b. Row c. Table 6. You've been asked to interpret the profit trend for your company, using this graph that shows the 5-year profit trend. Which description is an accurate interpretation of the data? A. Profits remained constant. B. Profits show an upward trend. C. Profits peaked in year 4. D. The profit has been declining for the last two years. 7. For each statement about t-tests and their results, select Yes if it is true or No if it is false. A. A small t-score indicates the groups are similar. Answer:YES B. A low p-value shows the results occurred by chance. Answer:NO C. The null hypothesis assumes the means of the sample data sets are equal. Answer:YES 8. Answer each question about the data in the table below by selecting the correct option from each drop-down list. Products A B C D Row #1 Row #2 Row #3 Row #4 Region 1 10 20 20 30 20 20 10 30 Region 2 30 15 25 30 25 30 15 30 Region 3 20 40 60 40 40 40 20 60 A. Which aggregate function is used in Row #1? Answer:Average or Mean B. Which aggregate function is used in Row #2? Answer:Mode C. Which aggregate function is used in Row #3? Answer:Min D. Which aggregate function is used in Row #4? Answer:Max 9. Which two examples are data? (Choose 2.) A. A patient's temperature B. A patient's type of illness C. A patient's heartrate Region 4 15 25 15 25 20 15 15 25 D. A patient's prognosis 10. Students complain that a recent test was too hard. Their professor creates a table with the students' test scores. Student Test Score A 32 B 67 C 76 D 65 E 79 F 78 G 59 H 72 I 44 J 71 K 33 L 47 M 43 N 74 Which data visualization allows the professor to see the distribution of the test scores? A. B. C. D. Answer:B