The Following Table Shows the Results of a Survey of 400

question 82

Multiple Choice

The following table shows the results of a survey of 400 authors by a (fictitious) publishing company: $$\begin{array} { | l | l | l | l | } \hline & \begin{array} { l } \text { New } \\\text { Authors }\end{array} & \begin{array} { l } \text { Established } \\\text { Authors }\end{array} & \text { Total } \\\hline \text { Successful } & 60 & 50 & 110 \\\hline \text { Unsuccessful } & 130 & 160 & 290 \\\hline \text { Total } & 190 & 210 & 400 \\\hline\end{array}$$ An author is chosen at random.
Compute the estimated probability of the event that the author is established.

• A) \(\frac { 2 } { 5 }\)
• B) \(\frac { 19 } { 40 }\)
• C) \(\frac { 21 } { 40 }\)
• D) \(\frac { 16 } { 29 }\)
• E) \(\frac { 5 } { 11 }\)

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Definitions:

Conduction Hearing Loss

A less common form of hearing loss, caused by damage to the mechanical system that conducts sound waves to the cochlea.

Middle Ear

The chamber between the eardrum and cochlea containing three tiny bones (malleus, incus, and stapes) that concentrate the vibrations of the eardrum on the cochlea’s oval window.

Cochlear Implant

A device for converting sounds into electrical signals and stimulating the auditory nerve through electrodes threaded into the cochlea.

Electrical Signals

Pulses of electric current that transmit information within the nervous system and between electronic devices.