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What is the z value for the upper

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Reference no: EM132483175

The president of a university is concerned that illicit drug use on campus A random sample of 25 students revealed that 10 of them had used illicit drug during the last year.

a) What is the z value for the upper 90% for the proportion of students who had used illicit drug during the last year?

Reference no: EM132483175

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