Solve the Problem $$\begin{array} { r r r r r } 1 & 3 & 2 & 1 & 4 \\23 & 40 & 24 & 16 & 31 \\1 & 19 & 12 & 2 & 37\end{array}$$

question 48

Multiple Choice

Solve the problem. Round your answer to one decimal place unless otherwise indicated.
-A long-distance phone company wishes to estimate the mean duration of long-distance calls originating in california. A random sample of 15 long-distance calls originating in California yields the following call durations, in minutes.

$$\begin{array} { r r r r r } 1 & 3 & 2 & 1 & 4 \\23 & 40 & 24 & 16 & 31 \\1 & 19 & 12 & 2 & 37\end{array}$$
Use the data to obtain an estimate of the mean call duration for all long-distance calls originating in California.

• A)14.4 minutes
• B)15.2 minutes
• C)14.6 minutes
• D)14.9 minutes

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Definitions:

Tympanic Membrane

A fibrous partition located at the inner end of the ear canal and separating the outer ear from the middle ear; also called the eardrum.

Tympanic Membrane

Also known as the eardrum, it is a thin membrane that separates the external ear from the middle ear and vibrates in response to sound waves.

Anterior Chamber

The fluid-filled space between the cornea and the iris in the eye.

Transparent Area

A region in a material or substance that allows light to pass through so that objects behind can be distinctly seen.