Which of the below is the correct calculation of the 95¥% confidence interval?

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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We are given that n = 670, p = 0.85, we also just learned that the standard
error of the sample proportion is
%3D
p (1 - р)
SE, =
п
Which of the below is the correct calculation of the 95\% confidence
interval?
(a) 0.85 ± 1.96 ×
0.85x0.15
670
(b) 0.85 ± 1.65 x
0.85x0.15
670
(c) 0.85 ± 1.96 ×
0.85x0.15
V670
(d) 571 ± 1.96 ×
571x99
670
Transcribed Image Text:We are given that n = 670, p = 0.85, we also just learned that the standard error of the sample proportion is %3D p (1 - р) SE, = п Which of the below is the correct calculation of the 95\% confidence interval? (a) 0.85 ± 1.96 × 0.85x0.15 670 (b) 0.85 ± 1.65 x 0.85x0.15 670 (c) 0.85 ± 1.96 × 0.85x0.15 V670 (d) 571 ± 1.96 × 571x99 670
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