What is Statistics has two branches?

descriptive (summarise data) and inferential (generalise from samples).

What is Hypothesis tests use a test statistic and p?

value to assess evidence against a null hypothesis.

$Y = \beta_0 + \beta_1 X + \varepsilon$; interpret coefficients carefully (correlation vs causation).

discrete take specific values, continuous take any value in an interval.

Updated 8/3/2026

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The total number of individuals in a population is represented by the symbol N, and the number of units in a sample is represented by the symbol m.

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What are two meanings of the term 'Statistics' given in the content?

1) Numbers that can be collected to define, organize and present data. 2) A field of study.

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