Question

Find the level of confidence assigned to an interval estimate of the mean formed using the following intervals. (Round your answers to four decimal places.)

(a) x − 0.93·σ_x to x + 0.93·σ_x


(b) x − 1.67·σ_x to x + 1.67·σ_x


(c) x − 2.17·σ_x to x + 2.17·σ_x


(d) x − 2.68·σ_x to x + 2.68·σ_x

Answer 1

Here, = 0.3524 hence, level of confidence= (1-)*100%

level of confidence= (1-0.3524)*100%

level of confidence=64.76%

Here, = 0.0944 hence, level of confidence= (1-)*100%

level of confidence=(1-0.0944)*100%

level of confidence=90.56%

Here, = 0.03 hence, level of confidence= (1-)*100%

level of confidence=(1-0.03)*100%

level of confidence= 97%

Here, =0.0074 hence, level of confidence=(1-)*100%

level of confidence=(1-0.0074)*100%

level of confidence= 99.26%