Refer to the Mega-Stat/Excel Output for the Wilcoxon Rank Sum $\text { Wilcoxon - Mann/Whitney Test }$

question 28

Multiple Choice

Refer to the Mega-Stat/Excel output for the Wilcoxon rank sum test given in the table below.
$\text { Wilcoxon - Mann/Whitney Test }$
$\begin{array} { l }\quad2\quad\quad\text { sum of ranks }\\\begin{array}{|c|c|}\hline 10\quad\quad \quad& 66.5\quad \\\hline 10 & 143.5 \\\hline \end{array}&\begin{array} { l }\text { Group } 1\\\text { Group } 2\\\end{array}\\\quad 20\quad\quad\quad\quad210&\text { total }\\\end{array}$

105.00 $\quad$ expected value
13.07 $\quad$ standard deviation
$-2.91\quad \mathrm{z}$ , corrected for ties
$.0018\quad \mathrm{p}$ -value (two-
tailed)
-At a significance level of .05,which one of the following rejection point conditions is correct when the alternative hypothesis is H_a: D₁ is shifted to the left of D₂?

• A)Reject H₀ if T ? 83.
• B)Reject H₀ if T ? 127
• C)Reject H₀ if T ? 131
• D)Reject H₀ if T ? 83
• E)Reject H₀ if T ? 79

---

Definitions:

MSE

Mean Squared Error, a measure used to evaluate the performance of a regression model by calculating the average squared difference between the observed actual outcomes and the outcomes predicted by the model.

MSG

Monosodium Glutamate, a flavor enhancer commonly used in cooking and processed foods; if in statistical context, it might be a typo or not a recognized term, hence NO.

SAT Math

SAT Math is a section of the SAT, a standardized test used for college admissions in the United States, focusing on mathematical skills and problem-solving abilities.

Freshman Class

The group of new students in their first year at a high school, college, or university.