A Survey Conducted in a College Intro Stats Class Asked

question 81

Essay

A survey conducted in a college intro stats class asked students about the number of credit hours they were taking that quarter. The number of credit hours for a random sample of 16 students is given in the table. $$\begin{array} { | l | l | l | l | l | l | l | l | } \hline 10 & 10 & 12 & 14 & 15 & 15 & 15 & 15 \\\hline 17 & 17 & 19 & 20 & 20 & 20 & 20 & 22 \\\hline\end{array}$$
-a. Sketch a histogram of these data
b. Find the mean and standard deviation for the number of credit hours.
c. Find the median and IQR for the number of credit hours.
d. Is it more appropriate to use the mean and standard deviation or the median and IQR to
summarize theses data? Explain.

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Definitions:

Salvage Value

The anticipated recovery value of an asset when it no longer has usable life.

Straight-Line Method

A method of calculating depreciation by evenly allocating the cost of an asset minus its salvage value over its estimated useful life.

Office Furniture

Items and fixtures used in an office setting for the purpose of work, including desks, chairs, and file cabinets.

Revised Annual Depreciation

The updated calculation of depreciation expense per year after making any necessary adjustments to asset value or useful life.