QuestionA sample of 35 students had mean cell phone age of 25 months with standard deviation 5 . Ten professors had a mean cell phone age of 30 months with standard deviation 8 .
Find the $99 \%$ confidence interval for the diffence in population means for the ages of cell phones. $\qquad$ $\square$ )
Is there sufficient evidence to conclude the age of student and professor cell phones is different? Choose one
Test Statistic: $T=$ $\square$