Some types of nerve cells have the ability to regenerate a part of the cell that has been amputated. In a study of this process in lemurs, researchers cut nerves emanating from the spinal cord of a sample of 22 animals and measured the content of creatine phosphate (CP). They found a sample mean of 0.113 mg/g, with a standard deviation of 0.044 mg/g

In healthy cells, the CP content is 0.15 mg/g. Assuming all relevant assumptions hold, conduct the appropriate test to determine if CP content in regenerating nerve cells differs from this amount in this population of lemurs.