The following is a relative frequency distribution of grades in an introductory statistics course. 
Construct a percent frequency bar chart for this data.
Definitions:
Cognitive Development
The construction of thought processes, including remembering, problem solving, and decision-making, from childhood through adolescence to adulthood.
Attention Span
The length of time a person can concentrate on a task without becoming distracted.
Formal Operational Stage
A stage in Piaget's theory of cognitive development where individuals develop the ability to think abstractly and logically.
Cognitive Development
Refers to the process through which individuals acquire and evolve their thinking skills, problem-solving abilities, and knowledge over time.
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