You are constructing a 95% confidence interval using the information: n = 60, x= 65.5, s = 2.5, and E = 0.7?

Question

x=65.5, x has a line over it. x=mean
What is the value of the middle of the interval?

Answer 1

i think solution of this goes like this ..

first find the confidence interval , using this formula
x bar - t(alpha/2 , n-1) * s / sqrtn < u < x bar + t (alpha/2, n-1) *s / sqrt n ...
where n -1 is degree of freedom ( df) and alpha /2 = 5%/2 = 2.5%
use student t distribution table for calculation t ( alpha/2 , n-1)
.and after getting confidence interval..calculate middle term ..

hope this will help you
regards
rakesh gupta

Answer 2

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