Other tags that relate to A Well-stirred Sample
Sampling and hypothesis testing. Processing and representing data. Interpreting data. Carroll diagrams/Two way tables. Handling data. Collecting data. Binomial distribution. Probability distributions, expectation and variance. Random variables. Sampling.There are 16 results
Broad Topics > Advanced Probability and Statistics > Probability distributions, expectation and variance
A Well-stirred Sample
Age 16 to 18 Challenge Level:
Typical survey sample sizes are about 1000 people. Why is this?
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.
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?
Binomial or Not?
Age 16 to 18 Challenge Level:
Are these scenarios described by the binomial distribution?
Understanding Hypotheses
Age 14 to 18
This article explores the process of making and testing hypotheses.
What's Your Mean?
Age 16 to 18 Challenge Level:
Can you work out the means of these distributions using numerical methods?
Can You Find ... Random Variable Edition
Age 16 to 18 Challenge Level:
Can you create random variables satisfying certain conditions?
Data Matching
Age 14 to 18 Challenge Level:
Use your skill and judgement to match the sets of random data.
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?
Aim High
Age 16 to 18 Challenge Level:
How do you choose your planting levels to minimise the total loss at harvest time?
What Is a Random Variable, Really?
Age 16 to 18
This article offers an advanced perspective on random variables for the interested reader.
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?
Exponential Intersection
Age 16 to 18 Challenge Level:
Can the pdfs and cdfs of an exponential distribution intersect?
Spinners
Age 16 to 18 Challenge Level:
How do scores on dice and factors of polynomials relate to each other?
NRICH is part of the family of activities in the Millennium Mathematics Project.