1) For a formal statistical hypothesis test, what is the appropriate order of th
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Question
1) For a formal statistical hypothesis test, what is the appropriate order of the steps?
a)Calculate the test statistic based on the sample data
b)Draw the statistical conclusion from the p-value.
c)Study the research question, define the appropriate null and alternative hypotheses.
d)Check the corresponding statistical assumptions.
e)Calculate the p-value
2)A health insurer has determined that the standard fee for a certain medical procedure is $1000. However, they suspect that the average fee charged by one particular clinic for this procedure is not $1000. The insurer wants to perform a significance test to determine whether their suspicion is correct. The hypotheses are: H0: µ = $1000, HA: µ $1000. Suppose the results of a sample of actual charges for the procedure lead to rejection of the null hypothesis. Classify the results of the test if in fact the average fee charged by the clinic is $1000.
a)Type I error
b)Type II error
c)No error
3) When compared to a paired t-test, the Wilcoxon Signed Rank test loses information because it only takes into account the relative magnitude of the differences (i.e. their ranks), not the actual values of the differences.
a)True
b)False
4) According to Wikipedia, ambidexterity is defined as “the state of being equally adapted in the use of both the left and the right hand, and also in using them at the same time.” A group of researchers are interested in determining whether ambidextrous individuals also have equal strength in their left and right hand, as measured with a handgrip dynamometer (see http://www.topendsports.com/testing/products/grip-dynamometer/ if you want to learn more), and they have asked you to help with the statistical analysis.
a)What is the parameter of interest?
b)Specify the null hypothesis.
Please have it done as soon as possible, thanks so much!
Explanation / Answer
1) For a formal statistical hypothesis test, what is the appropriate order of the steps?
a)Calculate the test statistic based on the sample data
b)Draw the statistical conclusion from the p-value.
c)Study the research question, define the appropriate null and alternative hypotheses.
d)Check the corresponding statistical assumptions.
e)Calculate the p-value
c-d-a-e-b is correct order
2)
The type I error rate or significance level is the probability of rejecting the null hypothesis given that it is true.
here we reject the null even though it is true
hence it is Type I error
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