A random sample of 40 adults with no children under the age of 18 years results in a mean daily leisure time of 5.56 hours, with a standard deviation of 2.47 hours. A random sample of 40 adults with children under the age of 18 results in a mean daily leisure time of 4.48 hours, with a standard deviation of 1.91 hours. Construct and interpret a 90% confidence interval for the mean difference in leisure time between adults with no children and adults with children 12.

Let 1 represent the mean leisure hours of adults with no children under the age of 18 and 2 represent the mean leisure hours of adults with children under the age of 18.

The 90% confidence interval for 12 is the range from ? hours to ? hours.