Students Taking an Intro Stats Class Reported the Number of Credit

question 104

Essay

Students taking an intro stats class reported the number of credit hours that they were taking that quarter. Summary statistics are shown in the table. $$\begin{array} { | l | c | } \hline \bar { x } & 16.65 \\\hline s & 2.96 \\\hline \text { min } & 5 \\\hline \text { Q1 } & 15 \\\hline \text { median } & 16 \\\hline \text { Q3 } & 19 \\\hline \text { max } & 28 \\\hline\end{array}$$
a. Suppose that the college charges $73 per credit hour plus a flat student fee of $35 per quarter. For example, a student taking 12 credit hours would pay $ $\$ 35 + \$ 73 ( 12 ) = \$ 911 \text { for }$ that quarter.
i. What is the mean fee paid?
ii. What is the standard deviation for the fees paid?
iii. What is the median fee paid?
iv. What is the IQR for the fees paid?
b. Twenty-eight credit hours seems like a lot. Would you consider 28 credit hours to be
unusually high? Explain.

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Definitions:

Fracture

A break or crack in a rock; subdivided into joints and faults.

Rock Layers

Strata or sequences of rock sediment that have accumulated over time, each layer representing a specific era in geologic history.

Youngest Unit

The most recently formed or deposited geological layer or structure in a sequence.

Logrolling

A political term denoting the practice of exchanging favors, especially in legislative contexts, but can also refer to reciprocal arrangements in other areas.