You are considering testing a new drug that is supposed to facilitate learning in mentally retarded children. Based on preliminary research, you have some idea about the size of the drug's effect. Because of your work schedule you can either do the test with 15 subjects or with 20. You would like to only run 15 subjects, but if running 20 will make power at least 20% higher, you will run 20 subjects. Calculate power for the following conditions: 
Definitions:
Sampling Distribution
The probability distribution of a given statistic based on a random sample, used to estimate population parameters.
Formal Charge
Used to calculate the charge of an atom in a molecule, assuming that electrons in all chemical bonds are shared equally between atoms.
Nitrogen
A chemical element with symbol N and atomic number 7, essential for life and a major component of the Earth's atmosphere.
Electron Configuration
The arrangement of electrons within the orbitals of atoms or molecules.
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