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

question 115

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:
Note: 4.3946E-15 is 4.3946×10^-15

-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:

Null Hypothesis

A default hypothesis that there is no significant difference or effect, often to be tested against an alternative hypothesis.

Sample Size

Refers to the quantity of participants or observations used in a statistical analysis.

P-value

A statistical measure that helps researchers determine the significance of their results, indicating the probability of observing their results if the null hypothesis were true.

One-sample T Test

A statistical test used to determine whether a sample mean significantly differs from a known or hypothesized population mean.