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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.

This exercise is part of the course

Inference for Numerical Data in R

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Exercise instructions

  • 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.

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

# Construct 95% CI using a t-test
test_results <- ___

# See the results
test_results
Edit and Run Code