Professor Aurora was examining the relationship between employment status and GPA. When she compared the mean of a sample of students who worked full-time to the population mean of all students enrolled at Bakersfield College she found that full-time students had a slightly higher GPA. The z-obtained was +1.15. What will she say regarding the statistical significance of her test?
1) Additional tests would need to be performed to determine statistical significance.
2) Her findings show that full-time employed students had a higher GPA to a statistically significant level.
3) Her findings were not statistically significant.
4) There is not enough information to determine statistical significance.