An educator believes new directed reading activities in the classroom will help elementary school pupils improve some aspects of their reading ability

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 second?grade classes. One second?grade class takes part in the new directed reading activities for an eight?week period. A control classroom of second?graders 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,x¯1=46.68, ????2=37.11,x¯2=37.11, ?1=11.58,s1=11.58, ?2=15.77,s2=15.77, ?1=26,n1=26, and ?2=24.and n2=24.

Find a 95%95% confidence interval for the difference between the treatment (Group 1) and the control (Group 2) means using the second approximation for degrees of freedom.

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

confidence interval