A survey claims that 9 out of 10 doctors (i.e., 90%) recommend brand Z for their patients who have children. To test this claim against the alternative that the actual proportion of doctors who recommend brand Z is less than 90%, a random sample of doctors was taken. Suppose the test statistic is z = -1.75. Can we conclude that H0 should be rejected at the a) ? = 0.1, b) ? = 0.05 and c) ? = 0.01 level? a) no; b) no; c) no a) no; b) no; c) yes a) yes; b) yes; c) yes a) yes; b) yes; c) no
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The null hypothesis (H0) is that the proportion of doctors who recommend brand Z is 90% (p = 0.9). Show more…
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A survey claims that 9 out of 10 doctors (i.e. 90%) recommend brand Z for their patients who have children. To test this claim against the alternative that the actual proportion of doctors who recommend brand Z is less than 90%, a random sample of doctors was taken. Suppose the test statistic is z = -2.23. Can we conclude that H0 should be rejected at the a) α=0.10, b) α=0.05, and c) α=0.01 level? Select one: A. a) yes; b) yes; c) yes B. a) no; b) no; c) yes C. None of the other answers D. a) no; b) no; c) no E. a) yes; b) yes; c) no
Sri K.
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