2. Find 95% lower bounds for the mean increases in scores from 2016 to 2017.

The school accountability movement has relied in large part on standardized test scores to evaluate students, schools, teachers, principals, and districts. It started under the No Child Left Behind Act, which went into effect in 2002 under President George W. Bush and continues today. A 2017 school accountability progress report for the state of Florida can be found on the Florida Department of Education homepage.21 The data that follow are the 2016 and 2017 achievement scores at the end of the course for grades 4–8 and 9–12 for Algebra 1 based on a random sample of n515 selected districts from the 67 county districts.

Transcribed Image Text:

Grade 4-8 Grade 9-12 District 2016 2017 2016 2017 Bay 95 93 49 51 Broward 91 92 42 49 Charlotte 94 95 44 45 Collier 95 91 43 51 Flagler 89 95 47 55 Hendry 57 78 24 20 Holmes 79 78 29 29 Lafayette 85 72 29 42 Marion 93 94 33 39 Monroe 91 98 36 69 Orange 82 83 27 27 Osceola 83 87 35 31 St. Johns 98 99 64 66 Taylor 75 79 18 24 Washington 94 88 28 31