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A high school teacher hypothesizes a negative relationship between performance in exams and performance in presentations....

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Basic Math

A high school teacher hypothesizes a negative relationshipbetween performance in exams and performance in presentations. Toexamine this, the teacher computes a correlation of 0.58 from arandom sample of 18 students from class. What can the teacherconclude with an α of 0.01?

a) Compute the appropriate test statistic(s) tomake a decision about H0.
(Hint: Make sure to write down the null and alternative hypothesesto help solve the problem.)
critical value =  ; test statistic =
Decision:  ---Select--- Reject H0 Fail to reject H0

b) Compute the corresponding effect size(s) andindicate magnitude(s).
If not appropriate, input and/or select \"na\" below.
effect size =  ;   ---Select--- na trivialeffect small effect medium effect large effect

c) Make an interpretation based on theresults.

There is a significant positive relationship between performancein exams and performance in presentations.There is a significantnegative relationship between performance in exams and performancein presentations.    There is no significantrelationship between performance in exams and performance inpresentations.

Answer & Explanation Solved by verified expert
4.5 Ratings (627 Votes)
Let denotescorrelation coefficient between performance in    See Answer
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