Use the formula 
to calculate the lower and upper limits of the 95% confidence interval for a sample of N = 12 with a mean 
= 6.00 and standard error of the mean 
= 1.15.
Definitions:
Average Workweek
The average number of hours worked per week by employees in a particular firm, sector, or economy.
Industrial Nations
Industrial Nations are countries with significant levels of industrialization and higher standards of living.
Edward Denison
An American economist known for his work on measuring the sources of economic growth.
Productivity Growth
An increase in the output of goods and services per unit of input, reflecting improvements in efficiency, technology, or processes.
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