In the Past,of All the Students Enrolled in "Basic Business

question 79

Essay

In the past,of all the students enrolled in "Basic Business Statistics," 10 percent earned A's,20 percent earned B's,30 percent earned C's,20 percent earned D's,and the rest either failed or withdrew from the course.Dr.Johnson is a new professor teaching "Basic Business Statistics" for the first time this semester.At the conclusion of the semester,in Dr.Johnson's class of 60 students,there were 10 A's,20 B's,20 C's,5 D's,and 5 W's or F's.Assume that Dr.Johnson's class constitutes a random sample.Dr.Johnson wants to know if there is sufficient evidence to conclude that the grade distribution of his class is different from the historical grade distribution.Calculate the expected values for A's and D's.

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Definitions:

Dissociative Disorder

A psychiatric disorder characterized by a disruption and inconsistency in one's thoughts, memories, environment, behaviors, and self-perception.

Bipolar Disorder

A disorder of mental health distinguished by pronounced changes in mood, alternating between periods of extreme happiness (mania or hypomania) and deep sadness (depression).

Passive-Aggressive Personality

A personality type that avoids direct confrontation but expresses hostility or resentment in subtle, indirect ways.

Phobic Disorder

A type of anxiety disorder characterized by an excessive and irrational fear of an object, situation, or activity.