Which Statement Is Correct

question 8

Multiple Choice

Which statement is correct?

• A) The social smile in response to another person first appears at about 12 weeks old.
• B) Very young infants seem incapable of expressing distress and contentment.
• C) A 5-month-old baby is likely to display fear of strangers and separation anxiety.
• D) An 11-month-old girl may show anxiety when her mother goes into another room.

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Definitions:

Area

A measure of the extent of a surface or shape, calculated in square units.

z

A standard score that indicates how many standard deviations an element is from the mean of its distribution.

Standard Normal Random Variable

A random variable with a mean of 0 and a standard deviation of 1, following a normal distribution.

Area

The measure of the extent of a two-dimensional figure or shape in a plane.