The Following Table Shows the Results of a Survey of 390

question 104

Essay

The following table shows the results of a survey of 390 authors by a (fictitious) publishing company: $$\begin{array} { | l | l | l | l | } \hline & \begin{array} { l } \text { New } \\\text { Authors }\end{array} & \begin{array} { l } \text { Established } \\\text { Authors }\end{array} & \text { Total } \\\hline \text { Successful } & 80 & 40 & 120 \\\hline \text { Unsuccessful } & 100 & 170 & 270 \\\hline \text { Total } & 180 & 210 & 390 \\\hline\end{array}$$ ​
An unsuccessful author is chosen at random.
Compute the estimated probability of the event that the unsuccessful author is established.

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Definitions:

Malthusian Theorem

The theory that exponential growth in population will outpace arithmetic growth in food production and other resources.

Demographic Transition

A theory about change over time from high birth and death rates to low birth and death rates, resulting in a stabilized population.

Industrial Revolution

The rapid transformation of social life resulting from the technological and economic developments that began with the assembly line, steam power, and urbanization.

Mortality Rates

A statistical measurement of the number of deaths in a particular population, scaled to the size of that population, per unit of time.