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A survey claims that 9 our of 10 doctors (90%) recommend brand z for their patients who have children. To test this claim again the
A survey claims that 9 our of 10 doctors (90%) recommend brand z for their patients who have children. To test this claim again the alternative that the actual proportion of doctors who recommend brand z is less than 90%, a random sample of 100 doctors results in 83 who indicate that they recommend brand z. The test statistic in this problem is approximately (round to the nearest hundredth)
A -1.83
B 2.33
C -1.99
D -2.33
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