There are 13 NRICH Mathematical resources connected to Averages, you may find related items under Handling, Processing and Representing Data.Broad Topics > Handling, Processing and Representing Data > Averages
Can you decide whether these short statistical statements are always, sometimes or never true?
Charlie has moved between countries and the average income of both has increased. How can this be so?
If you have a large supply of 3kg and 8kg weights, how many of each would you need for the average (mean) of the weights to be 6kg?
Are these statistical statements sometimes, always or never true? Or it is impossible to say?
What is the largest that the mean of these numbers could be?
Find the value of $m$ from these statements about a group of numbers
Can you do a little mathematical detective work to figure out which number has been wiped out?
How can people be divided into groups fairly for events in the Paralympics, for school sports days, or for subject sets?
Does weight confer an advantage to shot putters?
Can you make all of these statements about averages true at the same time?
Given a probability density function find the mean, median and mode of the distribution.
Given the mean and standard deviation of a set of marks, what is the greatest number of candidates who could have scored 100%?
Kyle and his teacher disagree about his test score - who is right?