In an Application to Estimate the Mean Number of Miles

question 157

Multiple Choice

In an application to estimate the mean number of miles that downtown employees commute to work roundtrip each day, the following information is given: n = 20 = 4.33 s = 3.50 Based on this information, the upper limit for a 95 percent confidence interval estimate for the true population mean is:

• A) about 5.97 miles.
• B) about 7.83 miles.
• C) nearly 12.0 miles.
• D) about 5.86 miles.

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Definitions:

Ascending track

Nervous system pathways that carry sensory information from the body up to the brain.

Spinal cord

A long, thin, tubular bundle of nervous tissue and support cells that extends from the brain. It is a major part of the central nervous system which conducts sensory and motor nerve impulses to and from the brain.

Motor information

Neural signals that originate in the brain and are conveyed to the spinal cord and muscles, guiding voluntary movements.