Data Science Quiz

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

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

• Data science is using computers to analyze data and to perform calculations on the data to produce information.

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

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

Which of the following best describes data visualization?

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

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

• A visual representation that communicates relationships among the data.

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

Is the following a visualisation or an infographic?

• Visualisation

• Infographic

• Chart

• Diagram

What is meant by a correlation?

• The relationship between two or more variables

• When there is an upward trend in a graph

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

• When data is placed in a graph

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

• Positive

• Negative

• Neutral

• No correlation is visible

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

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

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

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

• Data

• Analysis

• Plan

• Problem

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

• Data

• Analysis

• Plan

• Problem