If One Assumes That the Gestational Age Is Normally Distributed

question 11

Multiple Choice

If one assumes that the gestational age is normally distributed with mean 270 days and standard deviation 16.5, what proportion of births would be considered pre-term (less than 37 weeks) ?

• A) 0.18
• B) 0.25
• C) 0.33
• D) 0.75

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Definitions:

Sickle Cell Anemia

A hereditary blood disorder characterized by abnormal hemoglobin, resulting in some red blood cells assuming an abnormal sickle shape.

B-Thalassemia Major

A severe blood disorder caused by a genetic mutation, leading to reduced production of hemoglobin and potentially severe anemia.

Hemophilia

A medical condition, usually inherited, in which the ability of the blood to clot is severely reduced, causing the sufferer to bleed severely from even a slight injury.

X-Linked Recessive

A pattern of genetic inheritance where the gene causing the trait or disorder is located on the X chromosome; more common in males who have only one X chromosome.