For this problem you will need: pencil, paper, calculator, z-crit significance levels. and a NC probability calculator, Z-Crits for Common Significance Levels...

For this problem you will need: pencil, paper, calculator, z-crit significance levels. and a NC probability calculator,

Z-Crits for Common Significance Levels

https://docs.google.com/document/d/1bkcDAOsof2cceLd0qhIhiyJ4C09VkQwSuGUcOTQLLpI/edit?usp=sharing

Normal Curve Probability Calculator

https://www.mathportal.org/calculators/statistics-calculator/normal-distribution-calculator.php

According the the U.S. Department of Education, full-time graduate students receive an average salary of $15,000 with a standard deviation of $1,200. The dean of graduate studies at a large state university in PA claims that his graduate students earn more than this. He surveys 100 randomly selected students and finds their average salary is $16,000. Use a significance level of 0.05 to test if there is evidence that the dean's claim is correct.

What is the X? (do not enter the $)