Roger, Who Is 10 Months Old, Is Sitting on the Floor

question 143

Multiple Choice

Roger, who is 10 months old, is sitting on the floor of his room happily playing with his toys. The phone rings, and his mother leaves the room to get it. Roger begins to cry. Roger is experiencing

• A) separation anxiety.
• B) loneliness.
• C) fear of strangers.
• D) jealousy.

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Definitions:

Confidence Interval

Values range, derived from statistical samples, that possibly includes the value of an elusive population parameter.

Population Mean

The average value of a set of characteristics within a full population, calculated by summing all the values and dividing by the number of observations.

Sample Mean

The average value of all the observations in a sample, calculated as the sum of the observations divided by the number of observations in the sample.

Confidence Interval

It expresses the degree of uncertainty or certainty in a sampling method, represented as a range within which an estimated parameter is expected to lie.