A Wildlife Biologist Wants to Determine the Mean Weight of Adult

question 86

Multiple Choice

A wildlife biologist wants to determine the mean weight of adult red squirrels. She captures 10
Squirrels she believes to be representative of the species and weighs them, finding a mean of 12.32
Grams and standard deviation of 1.88 gm. Assuming these squirrels can be considered a random
Sample of all red squirrels which of the following formulas gives a 95% confidence interval for the
Mean weight of all squirrels?

• A) \(12.32 \pm 1.96 ( 1.88 / \sqrt { 10 } )\)
• B) \(12.32 \pm 2.262 ( 1.88 / \sqrt { 10 } )\)
• C) \(12.32 \pm 2.228 ( 1.88 / \sqrt { 10 } )\)
• D) \(12.32 \pm 2.268 ( 1.88 / \sqrt { 9 } )\)
• E) \(12.32 \pm 2.228 ( 1.88 / \sqrt { 9 } )\)

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Definitions:

Human Retina

The light-sensitive layer of tissue at the back of the inner eye, which includes cells that convert light into neural signals for visual recognition.

Highly Detailed Vision

A superior visual acuity that encompasses the ability to see fine details with clarity and precision.

Macula

A small central area of the retina in the eye, responsible for sharp, detailed central vision.

Vestibular System

The sensory system responsible for providing our brain with information about motion, head position, and spatial orientation; it also aids in maintaining balance.