A Hypothesis Regarding the Weight of Newborn Infants at a Community

question 9

Multiple Choice

A hypothesis regarding the weight of newborn infants at a community hospital is that the mean is 6.6 pounds. A sample of seven infants is randomly selected and their weights at birth are recorded as 9.0, 7.3, 6.0, 8.8, 6.8, 8.4, and 6.6 pounds. What is the sample variance?

• A) 1.177
• B) 6.6
• C) 1.385
• D) 7.6

---

Definitions:

Fissures

Deep grooves or splits in tissues or organs, including those found in the brain which separate different lobes or areas.

Cortex

The outermost layer of the brain involved in complex functions such as perception, thought, and decision-making.

Longitudinal Fissure

The profound fissure dividing the brain into two distinct hemispheres.

Central Fissure

Also known as the Rolandic fissure, it is a significant groove on the surface of the brain separating the frontal and parietal lobes.