The Mean Stubbornness Scores for the 8 Individuals in Sample

question 15

Multiple Choice

The mean stubbornness scores for the 8 individuals in sample A was 36. The mean for sample B, consisting of 12 individuals, was 42. A two-tailed independent samples t test was conducted and t_obt = +2.33. Given an α = .05, we can conclude that

• A) there was no significant difference between the means.
• B) there was a significant difference between the means.
• C) the null hypothesis should be rejected.
• D) both "b" and "c" are correct.

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Definitions:

Chronic Obstructive Pulmonary Disease

A group of lung diseases characterized by obstructed airflow leading to breathing difficulty, often caused by long-term exposure to irritating gases or particulate matter.

Muscular

Relates to muscles or the muscular system, especially concerning strength, flexibility, or physical fitness.

Chronic Obstructive Pulmonary Disease

Conditions affecting the lungs, like emphysema and chronic bronchitis, that result in challenges in breathing.

Barrel Chest

A rounded, bulging chest shape often associated with chronic obstructive pulmonary disease (COPD) and other respiratory conditions.