Find test statistic for brand

Reference no: EM13133349

A survey claims that 9 out of 10 doctors recommend brand Z for their patients. To test this claim against the alternative that the actual proportion of doctors is less than 90%, a random sample of 100 doctors resulted in 85 who recommended brand Z. The test statistic is approximately?

Reference no: EM13133349

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Find test statistic for brand : The actual proportion of doctors is less than 90%, a random sample of 100 doctors resulted in 85 who recommended brand Z. The test statistic is approximately?

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