A Wildlife Biologist Wants to Determine the Mean Weight of Adult

question 25

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

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Definitions:

100,000 Hz

A frequency unit representing 100,000 cycles per second in the electromagnetic spectrum, typically associated with high-frequency sounds beyond human hearing.

Opponent-Process Theory

A psychological and neurological model explaining how the perception of one stimulus (e.g., color) can affect the perception of another, leading to contrasting effects.

Color Pairings

The practice of combining colors based on their harmony and contrast to achieve a particular aesthetic or functional effect, often used in design and art.

Amplitude

The height or intensity of a wave, often used in contexts such as sound waves, which correlates with volume or loudness.