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Normal distribution-different brands of soft drink

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A marketing survey is conducting in which students are to taste two different brands of soft drink. Their task is to currently identify the brand tasted. A random sample of 200 students is taken assume that the students have no ability to distinguish between two brands p(A<pie sign<B) = 0.90

Recall the normal distribution can be used therefore the equation becomes P(-x<Z<X) =0.90 use technology to find X?

Reference no: EM13103824

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