From Past Experience, It Is Known 90% of One-Year-Old Children

question 91

Essay

From past experience, it is known 90% of one-year-old children can distinguish their mother's voice from the voice of a similar-sounding female. A random sample of 20 one-year-olds are given this voice recognition test.
a. Find the probability that at least three children do not recognize their mother's voice.
b. Find the probability that all 20 children recognize their mother's voice.
c. Let the random variable x denote the number of children who do not recognize their mother's voice. Find the mean of x.
d. Let the random variable x denote the number of children who do not recognize their mother's voice. Find the variance of x.
e. Find the probability that, at most, four children do not recognize their mother's voice.

Recognize the role of contracts and agreements in the protection of intellectual property.

Understand the effectiveness and challenges of import-substitution strategies.

Recognize the significance of entrepreneurship in economic development.

Identify the role of human capital and infrastructure in economic growth.

---

Definitions:

Anal Stage

A phase in Freudian psychosexual development occurring from approximately 18 months to 3 years, characterized by pleasure in controlling bowel and bladder movements.

Psychosexual Development

Freud's theory suggesting human personality development occurs through stages during childhood, each characterized by sexual pleasure in parts of the body.

Freudian Theory

Freudian Theory proposes that human behavior is influenced by unconscious desires, memories, and conflicts.

Electra Complex

A psychoanalytic theory that describes a girl's sense of competition with her mother for the affection of her father.