Test statistic for population proportion is given by
[tex]z=\frac{\hat{p}-p}{\sqrt[]{\frac{p(1-p)}{n}}}[/tex]where: p is population proportion, p^ is sample proportion and n is sample size. So, the test statistic will be:
[tex]\begin{gathered} z=\frac{0.90-0.95}{\sqrt[]{\frac{0.95(1-0.95)}{1135}}} \\ z=\frac{-0.05}{\sqrt[]{\frac{0.0475}{1135}}} \\ z=-7.728\approx-7.73 \end{gathered}[/tex]Answer: The value of the test statistic is - 7.73
