Find the value of the test statistic z. 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 = 647 drowning...

Find the value of the test statistic z.

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 = 647

drowning deaths of children with 30% of them attributable to beaches.