The Amount of Money That Maria Earns in a Week

question 26

Multiple Choice

The amount of money that Maria earns in a week is a random variable with a mean of $970 and a standard deviation of $25.The amount of money that Elena earns in a week is a random variable with a mean of $860 and a standard deviation of $10.How much more do you expect Maria to earn in a week than Elena? What is the standard deviation of this difference? Assume that Maria's earnings are independent of Elena's earnings.

• A)$1830,$35
• B)$110,$26.93
• C)$110,$22.91
• D)$110,$15
• E)$1830,$26.93

---

Definitions:

Total Income

The sum of all wages, salaries, profits, interest payments, rents, and other forms of earnings received in a given period of time.

Labor Force Participation

The percentage of the working-age population that is either employed or actively seeking employment.

Married Women

Refers to women who are legally united in marriage and the various societal, economic, and legal implications that status entails.

Education

The systematic process of facilitating learning, acquiring knowledge, skills, values, beliefs, and habits.