A researcher introduces a new phonics program in one preschool and uses a neighboring preschool as a no-treatment control group.
After the program is in place for one academic year, the researcher intends to evaluate the reading skills of the students in both preschools and then compare their scores. This research cannot be classified as a true experiment because ________.
The research cannot be classified as a true experiment because the researcher didn't control the participants of each group.
To have more control over the variables, the researcher must also control the assignment of the participants that will be in each group. The intention is that both the experimental and the control group have very similar conditions in order to observe the relationship between the dependent and the independent variable.
Cost minimization occurs when Marginal Product of Cement / Price of Cement = Marginal Product of Labor / Price of Labor.
Costs are minimized when the marginal product per dollar spent on all inputs is the same.
a.) Using the equation above, 50 / $4000 = 4 / $12
0.0125 = .333333 which is NOT equal. Therefore, the firm is not minimizing its cost of producing parking spaces. This is because the marginal products per dollar spent on inputs is not the same.
b.) Since the firm is not cost-minimizing, the firm must either choose quantities of C and L that make the marginal products per dollar equal. This can be done several ways, but for a concrete example, the firm can choose a quantity of C that will increase the MPC to $1,333.33. Then MPC / Price of C = 1,333.33 / $4,000 = 0.3333333 which would be equal to MPL / Price of L.
You can also decrease the MPL to meet 0.15. Then MPL / Price of L = 0.15 / $12 = 0.0125 which would be equal to MPC / Price of C.