Essay
For Questions , use the following narrative
Narrative: Cell phone survey
Suppose you suspect that most people are unhappy with their cell phone plans.You conduct a survey of 400 randomly selected cell phone owners ask them whether or not they are happy with their phone plans.Suppose 55% of the sample say no.
-{Cell phone survey narrative} Suppose there is no clear opinion on how people perceive their cell phone plans (that is, 50% are happy with them, and 50% are not.) What is a reasonable range for the proportion of unhappy customers from numerous repeated samples of size 400 from this population?
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