l6 Y9 S1 Data Science - End of Unit Assessment

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 analyse 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 a data visualisation?

• 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

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 visualisation below plots life expectancy (y-axis) against time (x-axis). What type of correlation does this visualisation 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.

• Point A
• Point B
• Point C
• Point D

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

• Problem, data, plan, analysis, conclusion
• Conclusion, plan, problem, data, Analysis
• Plan, problem, analysis, data, conclusion
• 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?

• Data
• Analysis
• Plan
• Problem

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