SOLUTION: A sample of 60 night-school students’ ages is
obtained in order to estimate the mean age of night-school
students. years. The population variance is 16.
a. Give a point estima
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-> SOLUTION: A sample of 60 night-school students’ ages is
obtained in order to estimate the mean age of night-school
students. years. The population variance is 16.
a. Give a point estima
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Question 1189600: A sample of 60 night-school students’ ages is
obtained in order to estimate the mean age of night-school
students. years. The population variance is 16.
a. Give a point estimate for m.
b. Find the 95% confidence interval for m.
c. Find the 99% confidence interval for m Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! variance is 16
sd =4
the point estimate is the mean of the sample.
the 95% CI is Mean +/-z*sigma/sqrt(n)
this is +/-1.96*4/sqrt(60)=1.01
so 95% CI is mean +/-1.01
99% CI is done the same way with z=2.576
Mean+/-1.33
