A Researcher Wants to Determine Whether the Means of Two $\quad$

question 38

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: $\quad$ $\quad$ $\quad$ $\quad$ Sample I $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ Sample II
$\begin{array}{llll|lllll}\hline 11.5 & 15.7 & 22.8 & 22.5 & 12.6 & 13.8 & 17.5 & 10.7 & 13.5 \\12.4 & 25.3 & 16.1 & 25.1 & 14.8 & 11.8 & 14.7 & 10.8 & 12.7\end{array}$

She uses the Mann-Whitney U test and a significance level of 0.05.The sum of ranks for sample II is ______.

• A)72
• B)73
• C)75
• D)77
• E)78

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Definitions:

Overestimate

Involves estimating a value or number to be higher than it actually is, often due to bias or misinformation.

Social Skills

The abilities used to communicate and interact with others effectively, including verbal and non-verbal communication, empathy, and conflict resolution.

Sociograms

Visual representations or maps showing the social connections and interactions within a group, often used to identify relationships and social dynamics.

Sociogram

A graphical depiction or chart that outlines the interconnections within a group, emphasizing the links between members.