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Perform hypothesis tests. Please label the test statistic you found (t value, z value, or Chi square) and the value. For the conclusion please state fail to reject or reject thenull hypothesis.
The national Academy of science reported in a 1997 study that 40% of research in mathematics is published by U.S.authors. The mathematics chairperson of a prestigious university wishes to test the claim that this percentage is no longer 40%. He has no indication of whether the percentage has increased or decreased. He surveys a simple random sample of 130 recent articles published by reputable mathematics journals and finds that 62 of these articles have U.S. authors. At the 0.10 level, does this evidence support the chairperson's claim that the percentage is no longer 40%?
Hypotheses:
Test Statistic and value
P-Value
Conclusion
In a randome sample of 32 units of this year's version of the Vagabond the mean output power is 42 watts, with a standard deviation of 8 watts.
How likely is it that the store owner will make at least $7,000 if she implements your suggestion?
What is the probability of obtaining a sample mean greater than M=105, for a random sample of n=9 people? For a random sample of n=36 people?
to find the sample size needed for a hypothesis test if ho mu10 ha mult10 sigma is unknown alpha 0.01 beta 0.05 and e
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