A Random Sample of 81 Students at a Local University

question 111

Short Answer

A random sample of 81 students at a local university showed that they work an average of 100 hours per month. The population standard deviation is known to be 27 hours. Compute a 95% confidence interval for the mean hours per month all students at the university work.

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Definitions:

Distal Stimuli

Objects or events in the external world that provide the basis for the perception of our immediate environment, as opposed to the sensory inputs that they generate.

Detectable Input

A level of stimulus that is sufficient to be noticed or detected by the sensory systems.

Wavelength

The distance between successive crests of a wave, usually used in the context of electromagnetic waves.

Amplitude

The magnitude or extent of change in a variable, often used in the context of waves to describe their height or intensity.