A local youth service agency has begun a sex education program for teenage girls who have been referred by the youth courts. The girls were given a 20-item test for general knowledge about sex, contraception, and anatomy and physiology upon admission to the program and again after completing the program. The scores for the first 15 girls to complete the program are listed below.
Construct frequency distributions for the pretest and post-test scores. Include a column for percentages.
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