# Resources tagged with: Probability distributions, expectation and variance

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There are 16 NRICH Mathematical resources connected to Probability distributions, expectation and variance, you may find related items under Advanced Probability and Statistics.

Broad Topics > Advanced Probability and Statistics > Probability distributions, expectation and variance ### Aim High

##### Age 16 to 18 Challenge Level:

How do you choose your planting levels to minimise the total loss at harvest time? ##### Age 16 to 18 Challenge Level:

Can you work out the means of these distributions using numerical methods? ### Time to Evolve 2

##### Age 16 to 18 Challenge Level:

How is the length of time between the birth of an animal and the birth of its great great ... great grandparent distributed? ### Stats Statements

##### Age 16 to 18 Challenge Level:

Are these statistical statements sometimes, always or never true? Or it is impossible to say? ### Into the Exponential Distribution

##### Age 16 to 18 Challenge Level:

Get into the exponential distribution through an exploration of its pdf. ### Random Inequalities

##### Age 16 to 18 Challenge Level:

Can you build a distribution with the maximum theoretical spread? ### Spinners

##### Age 16 to 18 Challenge Level:

How do scores on dice and factors of polynomials relate to each other? ### A Well-stirred Sample

##### Age 16 to 18 Challenge Level:

Typical survey sample sizes are about 1000 people. Why is this? ### Binomial or Not?

##### Age 16 to 18 Challenge Level:

Are these scenarios described by the binomial distribution? ### What Is a Random Variable, Really?

##### Age 16 to 18 ### Binomial Conditions

##### Age 16 to 18 Challenge Level:

When is an experiment described by the binomial distribution? Why do we need both the condition about independence and the one about constant probability? ### Can You Find ... Random Variable Edition

##### Age 16 to 18 Challenge Level:

Can you create random variables satisfying certain conditions? ### Statistics - Maths of Real Life

##### Age 14 to 18 Challenge Level:

This pilot collection of resources is designed to introduce key statistical ideas and help students to deepen their understanding. ### Exponential Intersection

##### Age 16 to 18 Challenge Level:

Can the pdfs and cdfs of an exponential distribution intersect? ### Understanding Hypotheses

##### Age 14 to 18 