Type the one-mean block of the cheat sheet: both intervals, both test statistics and the minimum n, with the conditions.

Answer

ONE MEAN (mu, x-bar) sigma known: x-bar +/- z(a/2) * sigma/sqrt(n) z = (x-bar - mu0)/(sigma/sqrt(n)) sigma unknown: x-bar +/- t(a/2; n-1) * s/sqrt(n) t = (x-bar - mu0)/(s/sqrt(n)) min n = (z * sigma / m)^2, round UP conditions: random sample; normal population or n > 30 (df > 30 -> inf row)

z when σ is given, t on n − 1 when s is used. The condition line is the one the sheet is graded on.

Module 1’s promised grid (L1.2); the formula lines of Modules 9–13; original