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

A high school teacher hypothesizes a negative relationship between performance in exams and performance in presentations. To examine this, the teacher computes a correlation of -0.23 from a random sample of 29 students from class. What can the teacher conclude with α = 0.01?

a) Obtain/compute the appropriate values to make a decision about H₀.
(Hint: Make sure to write down the null and alternative hypotheses to help solve the problem.)
critical value =  ; test statistic =
Decision:  ---Select one--- (Reject H0, Fail to reject H0)

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

c) Make an interpretation based on the results.

a. There is a significant positive relationship between performance in exams and performance in presentations.

b. There is a significant negative relationship between performance in exams and performance in presentations.

c. There is no significant relationship between performance in exams and performance in presentations.

Solutions

Expert Solution

orchestra answered 1 year ago

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