Question

Find the value of the test statistic z using z = .

Answer 1

Answer:

$\sf z = -16.35$

formula:

$\sf z = \dfrac{s-p}{\sqrt{\dfrac{p(1-p)}{n} } }$

Here s = 0.3, p = 0.5, n = 1671

solve:

$\rightarrow \sf z = \dfrac{0.30-0.5}{\sqrt{\dfrac{0.5(1-0.5)}{1671} } }$

$\rightarrow \sf z = \dfrac{-0.2}{\sqrt{\dfrac{0.25}{1671} } }$

$\rightarrow \sf z = -16.35$