An educator believes new directed reading activities in the classroom will help elementary school pupils improve some aspects of their reading ability. Suppose a researcher performs a test to evaluate this theory using two secondgrade classes. One secondgrade class takes part in the new directed reading activities for an eightweek period. A control classroom of secondgraders follows the same curriculum without the activities. At the end of the eight weeks, all students are given a Degree of Reading Power (DRP) test, which measures the aspects of reading ability that the treatment is designed to improve. Assume that the summary statistics are 1=46.68,x1=46.68, 2=37.11,x2=37.11, 1=8.53,s1=8.53, 2=14.13,s2=14.13, 1=26,n1=26, and2=24.andn2=24.

Find a 90%90% confidence interval for the difference between the treatment (Group 1) and the control (Group 2) means using the second approximation for degrees offreedom.

Give your answer as an interval in the form (lower bound, upper bound). Give your numbers for each bound to one decimalplace.