The accompanying cumulative relative frequency distribution shows a summary of the scores from an Algebra II exam at a local high school. Twenty students took the exam. 
a. Construct the relative frequency distribution. What proportion of students scored between 81 and 90?
B) Construct the frequency distribution. How many students scored between 71 and 80?
C) Construct an ogive. What is the approximate percentage of students that scored less than 85?
Definitions:
Introductory Psychology
A foundational course in psychology that covers basic concepts, theories, and research findings in the field.
Psychology Major
An academic program focusing on the study of the mind, behaviors, and mental processes.
Correlation Coefficients
A statistical measure that indicates the extent to which two or more variables fluctuate together. A positive correlation indicates a direct relationship, while a negative correlation indicates an inverse relationship.
Negative Correlation
A relationship between two variables in which one variable increases as the other decreases, and vice versa.
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