Dogs and cats are the two most popular pets families have in the United States. As a researcher, you are interested in how long pets stay with their families. After sampling 15 dog owners and 13 cat owners, you find that dogs have an average lifespan of 13 years with a standard deviation of 2 years, while cats have an average lifespan of 14 years with a standard deviation of 4 years. Do cats live longer than dogs? Let dogs be population 1, and let cats be population 2.

At the 10% level, what is the test statistic and conclusion of this test?