It is thought that more than 15 % of the furnaces used to produce steel in the
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Question:
It is thought that more than 15 % of the furnaces used to produce steel in the U.S. are still open-hearth furnaces.
To verify this contention, a random sample of 40 furnaces is selected and examined.
(a) Set the appropriate null alternative hypotheses required to support the statement contention.
(b) When the data are gathered, it is found that 9 of the 40 furnaces inspected are open-hearth furnaces.
Use the normal approximation to the binomial distribution to find the P value for the test.
Do you think that H0 should be rejected? Explain. To what type of error are you now subject?
Related Book For
Business Statistics a decision making approach
ISBN: 978-0133021844
9th edition
Authors: David F. Groebner, Patrick W. Shannon, Phillip C. Fry
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