By M.J. Moroney
This publication is meant to be a layman’s creation to stats. It sets
out to provide him the how and the why and the wherefore through which he can
recognize the type of challenge the place using facts will pay dividends.
It is designed to be appropriate for the non-mathematician, anyone with
common experience and a command of easy mathematics.
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Additional info for Facts from Figures
Figs. 15 and 16 show examples of special papers commonly in use. YOU SHOULD NOW BE ABLE TO DO THE FOLLOWING: Annual Number of wage £ employees I. Draw a horizontal line chart, histogram, 0- 99 10 frequency polygon, ascending and descending S4 100-199 ogives for the data in the table showing the 184 200-299 264 number' of employees earning different salaries 300-399 in a certain company. 146 400-499 Display the data in ideograph fonn using the 500-599 40 symbol ~ to represent 10 employees. 600-799 700-899 2.
IL. O en l- ::> 0 0 z « ~ .. " < ::> ~ li ~ ~ -' 'E t ~IX) 0"'" .... ,.... is ~ Q ~2 -Ie I~ ~IX) . E~ ,.... 0"'" .... _ ~~ t: t :t s:. ;;; ~~ w .... o0 ~ ~ ~ ~ V'I,ec ~ § . g-f I g : B J! t i) ~ ~E -s:: g z ij ~ ci: 0 .... ::. , . , . , . ~.. 0 0 en . :; -! co0 u ~ :1:)0- i:I:~ - .... i Q, ~ .. u "0 0 0 0 ~ 2 t THB MAGIC LANTBIlN TBCHNIQUB 21 inaking a diagmm perplexing, when the whole purpose of a diagmm is to render the meaning as plain as a pikestaff. Quite frequently, use is made of gmphs. It is as well to point out that there are rules to be obeyed if the graph is not to lose in value.
If we wish to differentiate between the various quantities we can nwnber them thus: XIo X2, Xl, X". , the labelling numbers being written as subscripts so ON THE AVERAGE 37 that they will not be confused with actual numbers entering into the calculation. (This may sound as confusing to the novice as it wiu be boring to the learned. ) Let us take as an example the calculation of the arithmetic average of the five numbers 5, 6, 8, 7, 6. e. letters to stand for any numbers we care to substitute for them according to the problem in hand) is that we can write down in a very compact way the rules for performing the calculation which will give us the correct answer to the type of problem we are dealing with.