Does Income Increase When You Get Married? to Investigate This,a

question 50

Multiple Choice

Does income increase when you get married? To investigate this,a college student has randomly selected people from his college town and collected income data for these people.They were categorized according to their marital status.The following results (in thousands of dollars) were obtained. The data are to be analyzed using the Wilcoxon rank sum test.Let W be the Wilcoxon rank sum test statistic equal to the sum of the ranks assigned to the married group.What is the expected value of W under the null hypothesis that the two distributions are the same?

• A)25
• B)27.5
• C)30
• D)55

---

Definitions:

Energy

The capacity to do work; expressed in kilojoules or kilocalories.

Irreplaceable

Something that cannot be replaced or substituted because of its unique qualities or significance.

Free Energy Change

A measure in thermodynamics indicating the amount of energy in a system that is available for work during a chemical reaction.

Endergonic Reactions

Chemical reactions that absorb energy from their surroundings, typically requiring an input of energy to proceed.