Question

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Answer 1

z ≈ -0.92

Explanation:

Put the numbers in place of the corresponding variables and do the arithmetic.

`z=\frac{\hat{p}-p}{\sqrt{(pq)/(n)}}=\frac{(495)/(1708)-0.30}{\sqrt{(0.30(1-0.30))/(1708)}}=(495-0.30(1708))/(√(1708(0.30)(0.70)))=(-17.4)/(√(358.68))\\\\\boxed{z\approx -0.92}`