20alondra04
30.10.2020 •
Mathematics
The ages of a group of 155 randomly selected adult females have a standard deviation of 17.9 years. Assume that the ages of female statistics students
have less variation than ages of females in the general population, so leto = 17 9 years for the sample size calculation. How many female statistics
student ages must be obtained in order to estimate the mean age of all female statistics students? Assume that we want 90% confidence that the sample
mean is within one-half year of the population mean Does it seem reasonable to assume that the ages of female statistics students have less variation
than ages of females in the general population?
The required sample size is
(Round up to the nearest whole number as needed)
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