A child psychologist wanted to determine if attending preschool
was related to higher IQ scores. To test this, the psychologist
choose a sample of n=10 children to participate in the local
pre-school program and measured their IQ scores after the program
was over. If the psychologist compared the mean of the sample to
the population mean of 100 with a standard deviation of 15, which
hypothesis test would be appropriate for this example?