A random sample of $40$ adults with no children under the age of $18$ years results in a mean daily leisure time of $5\mathrm{.}34$ hours, with a standard deviation of $2\mathrm{.}49$ hours. A random sample of $40$ adults with children under the age of $18$ results in a mean daily leisure time of $4\mathrm{.}31$ hours, with a standard deviation of $1\mathrm{.}55$ hours. Construct and interpret a $95\%$ confidence interval for the mean difference in leisure time between adults with no children and adults with children $({}_1-{}_2)$