Duncan Designed a Study to Examine Whether Sunscreen with a Higher

question 33

Multiple Choice

Duncan designed a study to examine whether sunscreen with a higher SPF was able to protect participants from sunburn better than sunscreen with a lower SPF. To test this, he randomly assigned half of his participants to wear a sunscreen with an SPF of 50. The other half were assigned to wear a sunscreen with an SPF of 35. After participants spent five hours in the sun, Duncan compared the level of sunburn across the groups. Which of the following would indicate that his two-group experimental study yielded a significant difference?

• A) t(101) = 5.31, p = .09, d = .29
• B) t(101) = 8.62, p = .03, d = .67
• C) t(101) = 1.61, p = .15, d = .22
• D) t(101) = 2.89, p = .72, d = .30

---

Definitions:

DVDs

Digital Versatile Discs, a type of optical storage media used for playing movies, software, and other data.

Efficiency

Optimal allocation of resources to ensure the best possible outcome or utility with minimal waste or inefficiency.

Efficiently Allocated

The optimal distribution of resources among different possibilities to maximize productivity and utility.

Least Cost

The principle of choosing the option that provides the necessary level of benefit or utility at the minimum possible cost.