A Researcher Wants to Determine Whether the Means of Two

question 26

Multiple Choice

A researcher wants to determine whether the means of two independent populations are the same.She has two independent random samples,one from each population,shown in the following table: She uses the Mann-Whitney U test and a significance level of 0.05.Then σ_U is ______.

• A) 10.055
• B) 11.025
• C) 11.255
• D) 12.025
• E) 12.255

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Definitions:

Anterior Sclera

The front part of the sclera, the white outer layer of the eyeball, providing structure and protection.

Otoliths

Otoliths are small, calcified particles in the inner ear that play a crucial role in sensing gravity and movement, aiding in balance and spatial orientation.

Semicircular Canals

Three fluid-filled tubes in the inner ear that help maintain balance by sensing rotations of the head.

Perilymph

Perilymph is the fluid that fills the space between the membranous labyrinth and the bony labyrinth of the inner ear, playing a key role in hearing and balance.