the mean age of a certa population. A sample of

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Researchers are interested in
the mean age of a certain
population. A sample of 36
individuals is drawn at
random has a mean of X
years. Assuming that the
population is approximately
normally distributed with
standard deviation 4 years,
can we conclude that the
mean is different from 20
years? (a=0.05).
The calculated value =
4.5
then
Transcribed Image Text:Researchers are interested in the mean age of a certain population. A sample of 36 individuals is drawn at random has a mean of X years. Assuming that the population is approximately normally distributed with standard deviation 4 years, can we conclude that the mean is different from 20 years? (a=0.05). The calculated value = 4.5 then
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