A consumer electronics company wants to determine the customer satisfaction rate for its new smartphone model. A random survey of recent purchasers found that reported being satisfied with their purchase, with a margin of error of . Which of the following statements is the most appropriate conclusion regarding the satisfaction rate of all purchasers of this smartphone model?
Exactly of all purchasers are satisfied with the smartphone.
It is plausible that between and of all purchasers are satisfied with the smartphone.
The satisfaction rate for all purchasers is definitely above .
The survey indicates that less than of all purchasers are satisfied.
