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What is cardinal data?

Number that says how many of something there are

Number that says how many sets of something there are

Number that is a positive integer

None of the above

In an ordinal data set ...

The values / observations are in increasing order

The values / observations belonging to it can be ranked

The values / observations are in an arithmetic progression

Can a source be both primary and secondary?

The diary if Anne Frank is a ...

Primary Source

Secondary Source

What is a common pitfall of primary research

Biased methodology

Correlation does not imply causation

Not considering other related factors

All of the above