A Study Determined That in 2009, 38% of Those in a Random

question 14

Multiple Choice

A study determined that in 2009, 38% of those in a random sample of 100 adult Americans had accounts with some type of social web site. In a similar survey conducted in 2012, 53% reported having accounts. Suppose that the 2012 figure was also based on a random sample of size 100. The 95% confidence interval for the difference in population proportions, P₂₀₁₂-P₂₀₀₉ , is: ​

• A)0.15 ± 0.088
• B)0.29 ± 0.136
• C)0.15 ± 0.136
• D)0.29 ± 0.88
• E)0.00 ± 0.136

---

Definitions:

Skin Turgor

The elasticity of the skin, often assessed through a pinch test to evaluate hydration status and the overall health of the connective tissue.

Pedal Pulse

A palpable beat of the heart that can be felt over the dorsalis pedis artery of the foot, indicating blood flow to the lower extremities.

Lung Crackles

Sounds heard through a stethoscope that are produced by fluid in the airways or alveoli during breathing, often associated with respiratory conditions.

Dyspnea

A medical term for difficulty breathing or shortness of breath, often experienced as a feeling of tightness in the chest.