Find the value of the test statistic $z$ using $z = \frac { \hat { p } - p } { \sqrt { \frac { p q } { n } } }$.
The claim is that the proportion of drowning deaths of children attributable to beaches is more than $0.25$, and the sample statistics include $n = 696$ drowning deaths of children with $30 \%$ of them attributable to beaches.
A) $3.05$
B) $- 3.05$
C) $- 2.88$
D) $2.88$

Question

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The Answer is A

Find the Value of the Test Statistic zzz Using z=p^−ppqnz = \frac { \hat { p } - p } { \sqrt { \frac { p q } { n } } }z=npq​​p^​−p​

Find the Value of the Test Statistic $z$ Using $z = \frac { \hat { p } - p } { \sqrt { \frac { p q } { n } } }$