Probability distributions, expectation and variance

problem
Stats statements

Age

16 to 18

Challenge level

Are these statistical statements sometimes, always or never true? Or it is impossible to say?
problem
Random inequalities

Age

16 to 18

Challenge level

Can you build a distribution with the maximum theoretical spread?
problem
Data matching

Age

14 to 18

Challenge level

Use your skill and judgement to match the sets of random data.
problem
Spinners

Age

16 to 18

Challenge level

How do scores on dice and factors of polynomials relate to each other?
article
Understanding hypotheses

This article explores the process of making and testing hypotheses.
problem
Exponential intersection

Age

16 to 18

Challenge level

Can the pdfs and cdfs of an exponential distribution intersect?