Andy C. answered • 05/19/18

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confidence coefficient for 99% is 2.58

2.58 * 19.4/sqrt(n) = 0.04

2.598*19.4/0.04 = sqrt(n)

( 2.598*19.4/0.04)^2 = n

1587676

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confidence coefficient for 90% is 1.64

(1.64*19.4/0.04)^2 = 632661.16

Niya I.

Hello. I have the same question as to the one above?
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11/10/20

Zulenka P.

hello how did you get 0.04 and i believe the second answer is wrong04/11/19