題組內容

(2) The data shown below were taken from a $3 \times 2$ factorial experiment to examine the effects of factor A (keyboard configuration, 3 levels) and factor B (word processing package, 2 levels) on typing speed. Each cell consists of the times needed for each of 4 randomly assigned keyboardists to type a standard document under each set of conditions (in minutes). (10%)

b. Test at the \( 5\% \) significance level to determine if time differences exist among the different keyboard configurations.