At One SAT Test Site Students Taking the Test for a Second

question 58

Multiple Choice

At one SAT test site students taking the test for a second time volunteered to inhale supplemental oxygen for 10 minutes before the test. In fact, some received oxygen, but others (randomly assigned) were given just normal air. Test results showed that 42 of 66 students who breathed
Oxygen improved their SAT scores, compared to only 35 of 63 students who did not get the oxygen. Which procedure should we use to see if there is evidence that breathing extra oxygen can help
Test-takers think more clearly?

• A) matched pairs t-test
• B) 2-sample t-test
• C) 2-proportion z-test
• D) 1-proportion z-test
• E) 1-sample t-test

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Definitions:

Umami

One of the five basic tastes, recognized for its savory or meaty flavor profile, often attributed to the presence of glutamates.

Spicy

Characterized by the presence of flavors derived from spices, often resulting in a sensation of heat when consumed.

Vegetables

Edible plants or parts of plants, including leaves, roots, flowers, and stems, that are consumed by humans as part of a healthy diet.

Pregnant

A state of carrying a developing fetus within the female body.