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

question 45

Multiple Choice

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 $\mathrm { n } = 696$ drowning deaths of children with $30 \%$ of them attributable to beaches.

• A) \(2.88\)
• B) \(3.05\)
• C) \(- 3.05\)
• D) \(- 2.88\) .

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Definitions:

Antibiotics

Medicinal substances used to treat bacterial infections by either killing the bacteria or inhibiting its growth.

Market

An economic system or environment where buyers and sellers engage in exchanges of goods, services, or information.

Total Surplus

The sum of consumer surplus and producer surplus, representing the total net benefits to society from a market transaction.

Private Value

The individual valuation of a good or service to a particular consumer or producer, not taking into account external effects or social welfare.