University Officials Say That at Least 70% of the Voting

question 13

Multiple Choice

University officials say that at least 70% of the voting student population supports a fee increase. If the 95% confidence interval estimating the proportion of students supporting the fee increase is [0.75, 0.85], what conclusion can be drawn?

• A)70% is not in the interval, so another sample is needed.
• B)70% is not in the interval, so assume it will not be supported.
• C)The interval estimate is above 70%, so infer that it will be supported.
• D)Since this was not based on population, we cannot make a conclusion.

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Definitions:

Midbrain

A portion of the central nervous system associated with vision, hearing, motor control, sleep/wake, arousal (alertness), and temperature regulation.

Hypothalamus

A region of the forebrain below the thalamus that coordinates both autonomic nervous system and pituitary, controlling body temperature, thirst, hunger, and other homeostatic systems, and involved in sleep and emotional activity.

Thalamus

A brain structure that acts as a relay station for sensory and motor signals to the cerebral cortex, playing a key role in processing sensory information.

Reticular Formation

A network of neurons located in the brainstem that plays a key role in controlling arousal and alertness.