Can you decide whether these short statistical statements are always, sometimes or never true?
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?
Can you do a little mathematical detective work to figure out which number has been wiped out?
Charlie has moved between countries and the average income of both has increased. How can this be so?
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
Does weight confer an advantage to shot putters?
Are these statistical statements sometimes, always or never true? Or it is impossible to say?
Can you make all of these statements about averages true at the same time?
