A Hypothesis Test Is to Be Performed for a Population $z = \frac { \hat { p } - \mathrm { p } _ { 0 } } { \sqrt { { p } _ { 0 } \left( 1 - \mathrm { p } _ { 0 } \right) / \mathrm { n } } }$

question 84

Multiple Choice

A hypothesis test is to be performed for a population proportion. For the given sample data and null hypothesis, compute the value of the test statistic, $z = \frac { \hat { p } - \mathrm { p } _ { 0 } } { \sqrt { { p } _ { 0 } \left( 1 - \mathrm { p } _ { 0 } \right) / \mathrm { n } } }$
-A research group wants to determine whether the proportion of car accidents caused by drivers using cell phones has changed from the previous value of 13%. They obtained 10,000 auto accident
Reports and found that 14% were caused by drivers using cell phones. The hypotheses are $\mathrm { H } _ { 0 } : \mathrm { p } = 0.13 , \mathrm { H } _ { \mathrm { a } } : \mathrm { p } \neq 0.13$
where p is the proportion of car accidents caused by drivers using cell
Phones.

• A)1.011
• B)2.974
• C)4.133
• D)5.947

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Definitions:

Superordinate Goals

Shared objectives that require cooperation and transcend individual or group conflicts.

Bystander Effect

In social psychology, a phenomenon where the probability of a person helping a victim decreases when there are additional witnesses.

Conflict

A battle or confrontation between conflicting forces, concepts, desires, or individuals.

Unarmed People

Individuals who are not carrying or equipped with weapons.