- Thread starter Mpp
- Start date

They're just asking if you can manipulate the formula and look up the probability associated with a critical value.

since, sample size is 100 we will use large sample theory

let us suppose that the statistics is mean

then

lower limit =mean - z(alpha)*s.e

where confidence level = 100(1-alpha)%

you just have to select alpha

to get the corressponding confidence level

you can go to excel and use norminv func for that enter norminv(alpha,0,1) it will return for one-tail.