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zalisa [80]
3 years ago
15

A researcher reports that the average salary of assistant professors is more than $42,000. A sample of 30 assistant professors h

as a mean salary of $43,260. At α = 0.01 test the claim that assistant professors earn more than $42,000 a year. A standard deviation of the population is $5230. Traditional Method.
(a) Identify the null and alternative hypotheses for this test.
(b) Identify the test statistic for this hypothesis test
(c) Accept or Reject the claim
Mathematics
1 answer:
alexira [117]3 years ago
4 0

Here I couldn't do this on Brainly but I made seperate pdf and did

Download pdf
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Candice is preparing for her final exam in Statistics. She knows she needs an 74 out of 100 to earn an A overall in the course.
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Hence the correct option is option b) Yes, the upper level of one standard deviation is 72.

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Here the given details are,

Mean = 68  

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Distribution is normal.  

Z-score for x = 74 is given as below:  

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So, the score of 74 is 1.5 standard deviations from the mean.  

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