Real estate agents always say "location, location, location" is the most important thing in buying a house. We want to know if the sales prices of homes in two neighborhoods are similar. A random sample is taken from each neighborhood. The prices of the homes in the two neighborhoods (in $1000) are

The standard deviation for the Wilcoxon rank sum test is

A. 6.245.
B. 6.
C. 6.523.

and

The z statistic for the Wilcoxon rank sum test is

A. z = 43.75.
B. z = 1.76.
C. z = 1.80.

and

The P-value for the Wilcoxon rank sum test is
A. more than 0.10.
B. between 0.05 and 0.10.
C. less than 0.05.