TABLE 13-12
the Manager of the Purchasing Department of a Large

question 94

Multiple Choice

TABLE 13-12
The manager of the purchasing department of a large banking organization would like to develop a model to predict the amount of time (measured in hours) it takes to process invoices. Data are collected from a sample of 30 days, and the number of invoices processed and completion time in hours is recorded. Below is the regression output:
$$\begin{array} { l c } { \text { Regression } \text { Statistics } } \\\hline \text { Multiple R } & 0.9947 \\\text { R Square } & 0.8924 \\\text { Adjusted R Square } & 0.8886 \\\text { Standard Error } & 0.3342 \\\text { Observations } & 30 \\\hline\end{array}$$ $\text{ANOVA}$

$\begin{array}{llcc}&\text { df} &\text {SS } &\text {M S}&\text { F}&\text { Significance F}\\\text { Regression } &1&25.9438&25 .9438&232 .2200&4 .3946 \mathrm{E}-15\\\text {Residual }&28 &3.12820 .1117 \\\text { Total } & 29 & 29.072\end{array}$


-Referring to Table 13-12, the degrees of freedom for the t test on whether the number of invoices processed affects the amount of time are

---

Definitions:

Triumph Of The Barberini

A term that symbolizes the rise to power and the cultural achievements of the Barberini family in Rome during the 17th century, including their patronage of the arts.

Ceiling Fresco

A mural painted on wet plaster on a ceiling, a technique especially popular in Renaissance and Baroque architecture for its grand and immersive effects.

Pietro Da Cortona

An Italian Baroque painter and architect, known for his frescoes and ceilings, which combine dramatic movement and rich coloring.

La Pittura

An Italian term meaning "the painting," often associated with discussions on the art and technique of painting.