A researcher collected data on the SAT scores in math of students in the north-eastern states. She is interested in determining whether or not her data is representative of the math scores for the entire country's population. The average score at the population level is 514 and the population standard deviation is 18. She collected data from 18 students and obtained a mean of 515. Conduct a 4-step hypothesis test.

Step 1:

Step 2:

Step 3:

Step 4:

NOW: Calculate the effect size. Report to the hundredths place.