Quiz

A researcher is interested in whether there is a difference between the average age of cat owners and the average age of dog owners.  The 75 dog owners that were surveyed averaged 42 years old and had a standard deviation of 10 years.  The 45 cat owners that were surveyed averaged 38 years old and had a standard deviation of 12 years old.  What can be concluded at the 0.05 level of significance?  Give your conclusion in the context of the question using a complete sentence.