A Biology Professor Reports That Historically Grades in Her Introductory

question 27

Essay

A biology professor reports that historically grades in her introductory biology course have
been distributed as follows: 15% A's, 30% B's, 40% C's, 10% D's, and 5% F's. Grades in her
most recent course were distributed as follows: $$\begin{array} { l | c | c | c | c | c } \text { Grade } & \text { A } & \text { B } & \text { C } & \text { D } & \text { F } \\\hline \text { Frequency } & 89 & 121 & 78 & 25 & 12\end{array}$$
a. Test an appropriate hypothesis to decide if the professor's most recent grade distribution
matches the historical distribution. Give statistical evidence to support your conclusion.
b. Which grade impacted your decision the most? Explain what this means in the context of
the problem.

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Definitions:

Erythrocytes

Red blood cells that carry oxygen from the lungs to the body's tissues and carbon dioxide back to the lungs.

Glucose

A simple sugar that is an important energy source in living organisms and is a component of many carbohydrates.

Renal Corpuscle

A structure in the kidney that includes the glomerulus and Bowman's capsule, where blood filtration begins.

Functional Unit

A functional unit refers to the smallest structure within an organ that can perform all of the functions of that organ.