The Test Scores of 15 Students Are Listed Below

question 65

Multiple Choice

The test scores of 15 students are listed below.Find the lower quartile (Q1) by hand.

• A)55
• B)56.5
• C)58
• D)85
• E)86

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Definitions:

Nephridial Organs

Excretory organs found in many invertebrates, functioning similarly to kidneys in removing metabolic wastes from the organism’s body.

Metanephridia

Excretory organs in many invertebrates, such as annelids, that filter body fluid directly from the coelom.

Flatworms

A group of simple, soft-bodied invertebrate animals that include planarians, tapeworms, and flukes, known for their flat bodies.

Atrial Natriuretic Peptide

A hormone secreted by heart atria cells in response to high blood pressure, functioning to reduce the volume of fluids in the body.