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

Question

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

Quizplus · Accepted Answer

The sum of ranks for sample II is 72. This can be calculated by adding up the ranks of the observations in sample II: 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 = 72.

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

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