A pharmaceutical company wants to test whether a new medication is able to greatly lower someone's cholesterol level within 5 weeks. To do this, the company's scientists measured the cholesterol levels of 100 participants before and after taking the medication. The mean cholesterol level before taking the medication was 200 mg/dL with a standard deviation of 10 mg/dL. The mean cholesterol level after taking the medication was 180 mg/dL with a standard deviation of 8 mg/dL. What statistical test should the company use to determine if the medication significantly lowers cholesterol levels?
1) t-test
2) ANOVA
3) Chi-square test
4) Correlation analysis