Exercise

Estimating the difference of two means using a t-interval

Earlier we used summary statistics and a visualization to compare the hourly pay of citizens vs. non-citizens. In this exercise we estimate the difference between the average hourly pay between these two groups.

The acs12_complete_hrlypay_citizen is already loaded for you.

Instructions

100 XP

Run a t-test to find a confidence interval for the difference in average hourly pay, hrly_pay between citizen and non-citizens, citizen in the acs12_complete_hrlypay_citizen dataset. Assign to test_results.