A random sample of size 36 is taken from a population with mean 
and standard deviation 
. Refer to Exhibit 7-5.The probability that the sample mean is less than 15 is ________.
Definitions:
Credibility
The characteristic of being deemed reliable and credible.
Establishing Credibility
The process of making oneself or one's statements believable or trustworthy.
Social Proof
A psychological phenomenon where people assume the actions of others in an attempt to reflect correct behavior for a given situation.
Social Proof
The psychological phenomenon where people assume the actions of others in an attempt to reflect correct behavior for a given situation.
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