DR. JEFFREYS implies in his letter in NATURE of September 17 (p. 535) that a prior probability cannot have a frequency interpretation. That there are several usages of the word probability is well ...
Frequency tables can be used to help present sets of data. There are 4 children aged 10, which gives a total age of 40 in that category. There are 6 children aged 11, which gives a total age of 66 in ...