When using the Friedman test to test the following data to determine whether there is a significant difference between treatment levels with α = 0.05, the critical value of chi-square is ___. 
Definitions:
Technological Innovation
The introduction of new technology or methods that significantly improve products, processes, or services.
Marginal Product Labor
The additional output produced as a result of employing one more unit of labor, holding other inputs constant.
Marginal Product Capital
This refers to the additional output produced as a result of using one more unit of capital, holding other inputs constant.
Maximum Profit Equilibrium
The point at which a firm achieves its highest level of profit given its production and cost constraints.
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