A Research Article Reports the Following: "The Mean Performance Scores

question 4

Multiple Choice

A research article reports the following: "The mean performance scores for the Normal Sleep, Reduced Sleep, and No Sleep groups were 18.0, 16.6, and 15.6, respectively, F(2,36) = 2.95, p < .05." Based on this information, which conclusion is most accurate?

• A)People who get no sleep perform significantly worse than people who sleep a reduced amount.
• B)People who sleep a reduced amount perform significantly worse than people who sleep a normal amount.
• C)The three groups do not all come from populations with the same mean, although it is not clear which population means are different.
• D)This null hypothesis cannot be rejected.

---

Definitions:

Holiday Shopping Season

The period between late November and early January where retail sales tend to increase significantly due to holiday-related shopping.

Online Retailers

Companies that operate on the internet and sell goods or services directly to consumers, without a physical storefront.

Pure Competition

A market structure characterized by a large number of firms selling identical products, making it easy for entry and exit, and ensuring no single firm can influence market prices.

Many Sellers

A market condition characterized by the presence of numerous vendors, promoting competition and providing a wide range of options for consumers.