In an effort to increase production of an automobile part, the factory manager decides to play music in the manufacturing

Question:

in an effort to increase production of an automobile part, the factory manager decides to play music in the manufacturing area. Eight workers are selected, and the number if items each produced for a specfic day is recored. After one week of music, the same workers are monitored again. The data are given in the table. AT x=0.05, can the manager conclude that the music has increase prodcution?

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