Data Science End Of Lesson Quiz 3

What does Data Science mean?

• Getting meaning from data

• Transfixing from data

• Showing data

What does visualisation mean?

• Showing data using transfix data

• Showing data in a graph or picture way

• Compressing data to display it

What does Big Data mean?

• Big data means data that is extremely large and will always crash the computer if open the file

• Big data means data that is extremely large and diverse

• Data from one source that is extremely large

What is the main reason why companies/governments use Big Data?

• Big data allows companies/governments to see the whole picture and make better-informed decisions

• Big data allows companies/governments to see the related data sets so they can isolate an idea

Why is it important that when we are looking at data, it needs to be reliable?

• If it is reliable, the outcomes will be correct

• If it is reliable, the outcomes will be incorrect

• You could get taken to court if you searched the data

What is an outlier in a dataset?

• A value that is very common

• A value that is unusually high or low compared to the other values

• A value that is exactly in the middle of the dataset

• A value that is difficult to calculate

Which of the following best describes correlation?

• A relationship between two variables where one variable causes the other to change

• A relationship between two variables where they both change together

• A relationship between two variables that is always negative

• A relationship between two variables that is always positive

What is the difference between correlation and causation?

• Correlation implies a cause-and-effect relationship, while causation does not

• Causation implies a cause-and-effect relationship, while correlation does not necessarily imply causation

• Correlation and causation are the same thing

• Causation only occurs when two variables are not correlated

What does Big Data mean?

• data that is extremely large and varied

• data that is extremely small

• data that has millions of entries but only about one type

Which project could you apply Data Science to? (multiple correct answer's )

• Covid infection rates

• School Grades

• Art selection criteria

• transfixing of data