An anatomy teacher hypothesizes that the final grades in her class are distributed as 10% A's, 23% B's, 45% C's, 14% D's, and 8% F's. At the end of the semester, she has the following grades. 
Find the critical value. Use 
.
Definitions:
Freud
Sigmund Freud, originating from Austria and known for creating the psychoanalytic method, treated mental illnesses by facilitating discussions between a psychoanalyst and the patient.
Libido
A term used in psychoanalytic theory to denote the energy of the sexual drive as a component of the life instinct.
Infant
A very young child or baby, typically under the age of one year, at the earliest stages of development.
Sensations
The initial process of detecting and encoding environmental stimuli through the senses.
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