A Professor Claims That There Is Only a 15% Chance

question 15

Short Answer

A professor claims that there is only a 15% chance of earning an "A" in her class.At the end of the semester,40 of the 278 students earn "A's." Using n = 278 and p = 0.15,approximate P(X = 40)by using the normal approximation.

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Definitions:

Upper-middle-income

A classification of socio-economic status used to describe individuals or families with income levels between the middle class and the affluent.

Industrially Advanced Countries

Nations with highly developed economies, significant industrial output, and advanced technological infrastructure.

Population Growth Rates

The rate at which the number of individuals in a population increases in a given time period as a result of birth rate, death rate, and net migration.

Industrialization

The process of transforming economies from primarily agricultural to one based on the manufacturing of goods, typically leading to economic growth and development.