Consider the following hypothesis problem. 
The test statistic equals
Definitions:
Infant Mortality
The death of children under the age of one year, measured by the infant mortality rate per thousand live births.
Developed Nations
Countries with advanced economic development, high standards of living, and well-established infrastructures.
Less Developed
Term often used to describe countries with lower levels of industrialization, technological advancement, and economic productivity compared to more developed nations.
Life Expectancy
The average age to which a person is expected to live based on demographic factors such as current age, gender, and health conditions.
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