In: Statistics and Probability
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.