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A survey claims that 9 out of 10 doctors (i.e., 90%) recommend brand Z for their patients who have ...

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A survey claims that 9 out of 10 doctors (i.e., 90%) recommend brand Z for their patients who have ...

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 = -1.95. Can we conclude that H₀ should be rejected at the

and

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

Textbook

Statistics: Informed Decisions Using Data

Edition: 5^th

Author: Sullivan

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