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Author Question: A company claims that 9 out of 10 doctors (i.e., 90%) recommend its brand of cough syrup to their ... (Read 89 times)

CORALGRILL2014

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on: Feb 14, 2020

Question 1

A company claims that 9 out of 10 doctors (i.e., 90%) recommend its brand of cough syrup to their patients. To test this claim against the alternative that the actual proportion is less than 90%, a random sample of 100 doctors was chosen which resulted in 83 who indicate that they recommend this cough syrup. The test statistic in this problem is approximately:
◦ -2.33
◦ 2.33
◦ -1.99
◦ -1.83

Question 2

A company claims that 9 out of 10 doctors (i.e., 90%) recommend its brand of cough syrup to their patients. To test this claim against the alternative that the actual proportion 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 and level?
◦ a) no; b) no; c) yes
◦ a) yes; b) yes; c) yes
◦ a) yes; b) yes; c) no
◦ a) no; b) no; c) no
Statistics ¦ McClave, Sincich, Tamarack ¦ 12th Edition
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Marked as best answer by CORALGRILL2014 on Feb 14, 2020

tmlewis4706

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Reply #1 on: Feb 14, 2020
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CORALGRILL2014

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Reply 2 on: Feb 14, 2020
YES! Correct, THANKS for helping me on my review

Dnite

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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