M. F. M. Osborne test, the cumulated distrbution 1s plotted in Fig 6 at thus stage our statistician can say that the population, insofar as the distribution wth respect to price 18 concerned, appears to be divded into perhaps three 与auoaooz 200 RATIO UNIT SCALE (LOGe P L 030405060800o 200 Fig 2 Distribution function for log, on July 31, 1956(all items NYSE) classes, If one can regard the two subdivisions of Fig 3 as signIficant a more searching examination of the data may reveal others(cf Fig 10) 5Hu 10o 2325 RATIO UNIT SCALE (LOGe P 星52004056°的160200 Fig 3. Distribution function of logeP for preferred stocks Our statistIcian lkes to choose an independent variable (log. in this case)that renders the data approximately normally distributed The testing of a statistical hypothesis 1s thereby greatly facilitated, and analo