Simple Random Sampling Has Been Used to Obtain a Sample

question 41

Essay

Simple random sampling has been used to obtain a sample of 81 elements from a population of size 500. The sample mean is 120, and the sample standard deviation is determined to be 36.
a.Estimate the standard error of the mean.
b.Develop an approximate 95% confidence interval for the population mean.
c.Estimate the population total.
d.Develop an approximate 95% confidence interval for the population total.

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Definitions:

Change Score

A statistical measure representing the difference between an individual's performance or score on a test or scale at two different times.

Fight-Or-Flight Response

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Physiological Reactions

Body responses to stimuli or environmental changes, including hormonal, neural, and biochemical processes.

Dilated Pupils

Condition in which the pupils of the eye become larger or wider than normal, often as a response to low light or certain emotions.