Find the value of z for which the standard normal random variable Z satisfies the following:
A) 
b. 
c. 
d. 
Definitions:
Impressions
The count of how many times an advertisement or digital content is displayed to users.
Lagged Effect
The delayed response or outcome resulting from an action or decision, often observed in marketing and economics.
Advertising Budget
The amount of money a business allocates for promoting its products or services through various advertising channels over a specific period.
Advertising Impact
Refers to the effect that marketing campaigns and messages have on the consumer's perceptions and behaviors.
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