A Researcher Wishes to Determine Whether Listening to Music Affects

question 32

Multiple Choice

A researcher wishes to determine whether listening to music affects students' performance on memory test.He randomly selects 50 students and has each student perform a memory test once while listening to music and once without listening to music.He obtains the mean and standard deviation of the 50 "with music" scores and obtains the mean and standard deviation of the 50 "without music scores".

• A)Two-sample t-test,since the researcher has two samples.
• B)Not enough information given to determine correct type of test.
• C)Pooled t-test,since the standard deviation is likely to be the same in both populations.
• D)Paired t-test,since there is a "with music" and "without music" score for each person.
• E)z-test for each sample,since the researcher has the sample standard deviation.

---

Definitions:

1820s

The decade spanning from January 1, 1820, to December 31, 1829, characterized by significant cultural, political, and technological changes worldwide.

Tejanos

Residents of Mexican heritage living in Texas, especially those who were in the region before it became part of the United States.

Fort Laramie Treaty

An agreement made between the United States and various Native American tribes, aiming to ensure peace along the Western frontier and specify land rights.

Northern Plains

A broad expanse of flat land, much of it covered in prairie, steppe, and grassland, located in the northern part of the Great Plains of the United States and Canada, often associated with agriculture and ranching.