The Following Table Shows the Results of a Survey of 410

question 202

Multiple Choice

The following table shows the results of a survey of 410 authors by a (fictitious) publishing company: $$\begin{array} { | l | l | l | l | } \hline & \begin{array} { l } \text { New } \\\text { Authors }\end{array} & \begin{array} { l } \text { Established } \\\text { Authors }\end{array} & \text { Total } \\\hline \text { Successful } & 90 & 10 & 100 \\\hline \text { Unsuccessful } & 120 & 190 & 310 \\\hline \text { Total } & 210 & 200 & 410 \\\hline\end{array}$$ An author is chosen at random.
Compute the estimated probability of the event that the author is unsuccessful.

• A) \(\frac { 12 } { 41 }\)
• B) \(\frac { 10 } { 41 }\)
• C) \(\frac { 41 } { 12 }\)
• D) \(\frac { 31 } { 41 }\)
• E) \(\frac { 19 } { 41 }\)

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Definitions:

Percentiles

Statistical measures indicating the value below which a given percentage of observations in a group of observations falls.

Interquartile Range

A measure of variability, defined as the difference between the first and third quartiles, describing the middle 50% of a data set.

25th Percentile

A value below which 25% of the data falls.

75th Percentile

A value below which 75% of the data points in a dataset fall, used as a measure of dispersion.