In a Manufacturing Process a Random Sample of 9 Bolts

question 40

Multiple Choice

In a manufacturing process a random sample of 9 bolts manufactured has a mean length of 3 inches with a variance of .09.What is the 90% confidence interval for the true mean length of the bolt?

• A)2.8355 to 3.1645
• B)2.5065 to 3.4935
• C)2.4420 to 3.5580
• D)2.8140 to 3.8160
• E)2.9442 to 3.0558

---

Definitions:

Acetylcholine

A neurotransmitter in both the peripheral and central nervous system that plays a key role in muscle activation and memory functions.

Skeletal Muscles

The muscles attached to bones that are responsible for voluntary movements of the body.

GABA

Gamma-Aminobutyric Acid, an inhibitory neurotransmitter in the brain that helps regulate nerve cell activity.

Hebbian Learning Rule

A principle describing how neurons might adapt during learning, suggesting that when a neuron frequently assists in firing another, the connection between them strengthens.