Under what circumstances should the standard normal distribution be used when employing the Mann-Whitney U test?
A) When the sample sizes are equal from the two populations
B) When the sample sizes are greater than 20
C) When the populations are normally distributed
D) You would never use the standard normal distribution.
Question 2
Consider the situation in which a study was recently conducted to determine whether the median price of houses is the same in Seattle and Phoenix. The following data were collected.
Seattle Phoenix
233,000 309,000
567,800 422,000
145,600 209,000
234,000 187,000
356,000 165,000
203,000 189,000
Given these data, if a Mann-Whitney U test is to be used, the sum of the ranks for Seattle is:
A) 43
B) 35
C) 25.5
D) 40
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