Question: Texas is home to more than one
Texas is home to more than one million undocumented immigrants, and most of them are stuck in low-paying jobs. Meanwhile, the state also suffers from a lack of skilled workers. The Texas Workforce Commission estimates that 133,000 jobs are currently unfilled, many because employers cannot find qualified applicants (The Boston Globe, September 29, 2011). Texas was the first state to pass a law that allows children of undocumented immigrants to pay in-state college tuition rates if they have lived in Texas for three years and plan to become permanent residents. The law passed easily back in 2001 because most legislators believed that producing college graduates and keeping them in Texas benefits the business community. In addition, since college graduates earn more money, they also provide the state with more revenue. Carol Capaldo wishes to estimate the mean hourly wage of workers with various levels
of education. She collects a sample of the hourly wages (in $) of 30 workers with a bachelor’s degree or higher, 30 workers with only a high school diploma, and 30 workers who did not finish high school. A portion of the data is shown in the accompanying table.
Hourly Wages of Texas Workers by Education Level (in $)
In a report, use the information to
a. Calculate descriptive statistics to compare the hourly wages for the three education levels.
b. Construct and interpret 95% confidence intervals for the mean hourly wage at each education level.
Transcribed Image Text:
High School Diploma Bachelor's Degree or Higher No High School Diploma 22.50 12.68 11.21 19.57 11.23 8.54 21.44 7.47 10.27
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