You have a sample of 1,925 female college graduates ages 25-29 in New York City and each one tells you their income and whether they majored in Economics or not. Fifty majored in economics, their average income is $68,000 and s-squared of 1.98 billion. 1,875 majored in other subjects with an average income of $52,000 and an s-squared of 2.01 billion. Assuming an equal variance in the two populations, test the null hypothesis that female econ majors aged 25-29 in New York City earn the same on average as college graduates with different majors.