SCENARIO 10-1
an Airline Wants to Select a Computer Software

SCENARIO 10-1
An airline wants to select a computer software package for its reservation system.Four software packages (1, 2, 3, and 4) are commercially available.The airline will choose the package that bumps as few passengers as possible during a month.An experiment is set up in which each package is used to make reservations for 5 randomly selected weeks.(A total of 20 weeks was included in the experiment.) The number of passengers bumped each week is obtained, which gives rise to the following Excel output: $$\begin{array} { l l l l l l l } \text { ANOVA } & & & & & \\\hline \text { Source of Variation } & \text { SS } & \text { df } & \text { MS } & F & \text { P-value } & \text { F crit } \\\hline \text { Between Groups } & 212.4 & 3 & & 8.304985 & 0.001474 & 3.238867 \\\text { Within Groups } & 136.4 & & 8.525 & & & \\\\\text { Total } & 348.8 & & & & & \\\hline\end{array}$$
-Referring to SCENARIO 10-1, the within groups degrees of freedom is

A) 3
B) 4
C) 16
D) 19