Robert heard that there 78 different apartments in the part of New York City he is considering moving to.The mean rental price is $1,800 with a standard deviation of $200.He is assuming his data is normally distributed and wants to know how many apartments he will have to look at if his goal rental price is $1,500.Use the standard distribution table to help Robert narrow down his search to apartments priced under $1,500. 
Definitions:
Experiment
A method of scientific investigation that seeks to discover cause-and-effect relationships by introducing independent variables and observing their effects on dependent variables.
Longitudinal
A type of study or research design where the same group of individuals is observed over a prolonged period to detect changes or developments.
Antidepressants
A class of drugs designed to alleviate symptoms of depression by adjusting the balance of neurotransmitters in the brain.
Cross-Sequential
A research design that involves studying different participants of various ages over time to understand changes across the lifespan.
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