By M.J. Moroney

This ebook is meant to be a layman’s advent to statistical data. It sets
out to offer him the how and the why and the wherefore in which he can
recognize the type of challenge the place using statistics will pay dividends.
It is designed to be appropriate for the non-mathematician, anyone with
common feel and a command of easy mathematics.

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Extra info for Facts from Figures

Sample text

The first is that if we were to take all our families and set them down in a long column starting with the smallest and working up to the largest, we could then use the size of that family which came halfway down the column as our measure of central tendency. This measure is called the median (meaning 'middle item '). Half of all families would have a size not less than that of the median family and half not more than that of the median family. Notice that in this way we do not take account at all of the actual numbers of children except for ranking purposes.

The mean i. the abscissa of the centre of gravity G It is really questionable - though bordering on heresy to put the question - whether we would be any the worse off if the whole bag of tricks were scrapped. So many of these index numbers are so ancient and so out of date, so out of touch with reality, so completely devoid of practical value w)1en they have been computed, that, their regular calculation must be regarded as a widespread SO FACTS FROM FIGURBS compulsion neurosis. Only lunatics and public servants with no other choice go on doing silly things and liking it.

1946 24 FACTS FROM FIGURES AUTHOR CL IN IC FINSTERER VIENNA RESECTION 5 BALFOUP. ROCHESTER "0 MORTALITY OF 202 CASES (1929 REPORTI S% OF 200 CASES (lqH REPORTI TRUESDALE FAL L R I VEl'. b o,'0 HANSSEN CHRISTIANA (tF 17 CASE S 922 REPORTI 1% OF SI CASES I q 2 J REPORTI Fig. 7. Example of a Horizontal Line Charf. Lowest reported resection mortality percentages taken from a lirst-class statistical report by Livingston and Pack: Elld Results ill thr Treotmrnt of Gastric Cancer (Paul B. , New York) '" ~ ~ 2: C ....