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In a sample of size 40, the sample mean is 15. In this case, the sum of all observations in the sample is ΣXi = 600.
Industrial Unions
Labor unions that organize workers across all crafts and trades within an entire industry, rather than according to the specific skills they possess.
Craft Unions
Labor organizations that represent workers in a specific trade or craft, focusing on skills and qualifications unique to that craft as the basis for membership.
Jurisdictional Fights
Conflicts between different unions or sections of unions over the right to represent a certain group of workers or perform specific job tasks.
Open Shop Movement
An effort to ensure that employment and retention do not depend upon whether the worker is a member of a labor union or not.
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