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A marketing survey is conducted in which students are to taste two different brands of soft drink. Their task is

to correctly identify the brand tasted. A random sample of 180 students is taken. Assume that the students have no ability to distinguish between the two brands.


The probability is​ 90% that the sample percentage is contained within what symmetrical limits of the population​ percentage? Identify the limits of the population percentage. The lower limit is _____ The upper limit is ______

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