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 =Â Â ; test statistic =
Decision:Â Â ---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 =Â Â ; Â Â ---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.
