AT&T Would Like to Test the Hypothesis That the Proportion

question 27

Multiple Choice

AT&T would like to test the hypothesis that the proportion of 18- to 34- year- old Americans that own a cell phone is less than the proportion of 35- to 49- year- old Americans. A random sample of 200 18- to 34- year- old Americans found that 126 owned a smartphone. A random sample of 175 35- to 49- year- old Americans found that 119 owned a smartphone. If Population 1 is defined as 18- to 34- year- old Americans and Population 2 is defined as 35- to 49- year- old Americans, the p- value for this hypothesis test is _______.

• A)0.1562
• B)0.0026
• C)0.0087
• D)0.1025

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Definitions:

Cortisol

A steroid hormone, produced by the adrenal gland, that regulates a wide range of processes throughout the body, including metabolism and the immune response. It's commonly known as the "stress hormone."

Depression

A psychological impairment characterized by continuous depressive emotions or apathy towards customary engagements, heavily disrupting normal daily functioning.

Immune Functioning

The processes and activities carried out by the immune system to protect the body against diseases, infections, and foreign substances.

Social Support

The perception or reality of being cared for, supported, and having assistance from other people.