Data Science

Q1. Which of the following is the most accurate definition of data science?

• a) Data science is extracting meaning from large data sets in order to provide insights to support decision-making

• b) Data science is using computers to analyse data and to perform calculations on the data to produce information

• c) Data science is performing experiments and recording the data produced by those experiments

• d) Data science is writing code to make sure that any inaccuracies in data sets are spotted and removed (cleaned)

Q2. Which of the following best describes a data visualisation?

• A. Presenting related data so that a user can see individual items of data

• B. Making sure that data is accessible and that no data is hidden

• C. A visual representation that communicates relationships among the data

• D. A collection of graphs that tell a story when put together

Q3. Is the following a visualisation or an infographic?

• A. Visualisation

• B. Infographic

Q4. What is meant by a correlation?

• A. The relationship between two or more variables

• B. When there is an upward trend in a graph

• C. When there is a set of data that doesn’t lie in the normal or expected range

• D. When data is placed in a graph

Q5. The visualisation below plots life expectancy (y-axis) against time (x-axis). What type of correlation does this visualisation show from 1949 onwards?

• A. Positive

• B. Negative

• C. Neutral

• D. No correlation is visible

Q6. The following graph shows the annual average temperatures recorded by a weather station over a period of 20 years. Identify the outlier in the data.

• A. Point A

• B. Point B

• C. Point C

• D. Point D

Q7. Which of the following is the correct order of the investigative cycle?

• A. Problem, data, plan, analysis, conclusion

• B. Conclusion, plan, problem, data, Analysis

• C. Plan, problem, analysis, data, conclusion

• D. Problem, plan, data, analysis, conclusion

Q8. In which step of the cycle would you pose the question(s) that you will use data to help you answer?

• A. Data

• B. Analysis

• C. Plan

• D. Problem

Q9. In which step of the cycle would you cleanse the data?

• A. Data

• B. Analysis

• C. Plan

• D. Problem

Q10. In which step of the cycle would you work out where the data will come from or how you will collect it?

• A. Data

• B. Analysis

• C. Plan

• D. Problem