American Chemical Society Organic Chemistry Full-Year 2020 - Composite Norms

Sep 21, 2026

Uploaded by Cipher

This document presents the composite norms for the American Chemical Society (ACS) Division of Chemical Education Organic Chemistry Full-Year 2020 examination (OR20). It provides a detailed statistical breakdown of student performance, including a comprehensive table mapping raw scores to their corresponding percentiles. Based on data from 1,692 students across 40 institutions, the report includes key performance metrics such as the mean score of 36.7, a standard deviation of 11.3, a median score of 35, a KR-21 reliability coefficient of 0.88, and a standard error of measurement of 3.98. This data serves as an essential reference for educators and institutions to evaluate student performance and calibrate academic assessments effectively within the context of organic chemistry education. The document structure enables clear analysis of how individual student results compare to the broader test-taking population.

LanguageEnglish

CategoryExam

FormatPDF

Pages1

Reading Time3 min

AccessFree to download

Examination Overview

Statistical Performance Metrics

Score and Percentile Conversion Table

FAQs

What is the mean score for the OR20 Organic Chemistry exam?

The mean score for the OR20 exam is 36.7.

How many students and institutions were involved in the calculation of these norms?

The norms were established based on the scores of 1,692 students from 40 different institutions.

What is the KR-21 reliability coefficient reported for this exam?

The KR-21 reliability coefficient for the 2020 Organic Chemistry full-year exam is 0.88.

Sep 21, 2026

Uploaded by Cipher