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A particular company that produced Christmas toys organized its factory workers into four different groups to compare the productivity of four different manufacturing protocols. As
A particular company that produced Christmas toys organized its factory workers into four different groups to compare the productivity of four different manufacturing protocols. As shown in what follows, measures of productivity over a period of one month indicated that the workers in Protocol 4 were the most productive of workers in any of the four work groups (higher scores indicate the number of Christmas toys assembled). Using the weighted mean, determine the overall mean productivity for all four work groups combined.
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