Use MINITAB and the following information to answer questions 39–42. A new production manager who believes that music can improve productivity arranges for music to be played on two out of three assembly lines. The first assembly line has no music. The second assembly line hears classical music.
The third assembly line hears “easy-listening” music. The productivity in the 10 working days after the experiment began is summarized in the following table. The data are believed not to follow a normal distribution.

Some people say it makes no difference whether music is played. Can you refute this argument? Do a 5 percent test.

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Assembly lines 1 110 157 121 103 149 123 142 134 124 118 2 114 159 120 160 142 130 112 119 127 116 3 130 139 96 140 116 142 99 133 111 105