A Study Was Conducted at the University of Waterloo on the Impact

question 22

Multiple Choice

A study was conducted at the University of Waterloo on the impact characteristics of football helmets used in competitive high school programs.There were three types of helmets considered,classified according to liner type: suspension,padded-suspension,and padded.In the study,a measurement called the Gadd Severity Index (GSI) was obtained on each helmet,using a standardized impact test.A helmet was deemed to have failed if the GSI was greater than 1200.Of the 81 helmets tested,29 failed the GSI 1200 criterion.Based on the sample results,what is the 90% confidence interval estimate for the true population proportion of suspension helmets that would fail the test?

• A)(0.304,0.416)
• B)(0.256,0.464)
• C)(0.213,0.507)
• D)(0.272,0.448)
• E)(0.553,0.737)

---

Definitions:

Revitalization Movement

A social movement aimed at reforming or renewing a society by consciously instigating major changes in values, practices, or symbols.

Cultural Reform

Cultural reform refers to significant changes made within a society’s cultural practices, beliefs, or institutions, aiming to improve social conditions or adapt to new ideals and norms.

Financial Security

The condition of having stable income or resources to manage expenses comfortably, including unforeseen emergencies, without incurring unsustainable debts.

Navajo Skinwalkers

In Navajo culture, skinwalkers are believed to be witches or shamans who can transform into animals.