The Lengths of Pregnancies Are Normally Distributed with a Mean

question 130

Multiple Choice

The lengths of pregnancies are normally distributed with a mean of 264 days and a standard deviation of 15 days. If 36 women are randomly selected, find the probability that they have a mean pregnancy between 264
Days and 266 days.

• A)0.2881
• B)0.7881
• C)0.2119
• D)0.5517

---

Definitions:

Popliteus

A small muscle located at the knee joint, involved in unlocking the knee by rotating the tibia on the femur when the leg begins to bend.

Pyramidalis

A small triangular muscle located in the lower abdomen, thought to play a role in tensing the linea alba.

Oblique Muscle

Oblique muscles refer to the muscles located on the sides of the abdomen, involved in rotating and side-bending the torso, which are divided into internal and external obliques.

Rectus Abdominis

A major muscle in the front of the abdomen, involved in moving the body between the ribcage and the pelvis and famously known as the "six-pack" muscle.