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.

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Definitions:

Conflict Handling Styles

Refers to the diverse strategies individuals use to address and manage conflicts, ranging from avoidance to direct confrontation.

Natural Tendency

An inclination or predisposition towards a particular behavior or action that is innate or instinctual.

Role Ambiguity

The uncertainty and lack of clarity about expectations, responsibilities, and the scope of one's job.

Uncertainty

The state of being uncertain or not being sure about the future or about what is the right thing to do.