Forced expiratory volume (FEV) is a measure of the rate of airflow (L/min) during one deep exhalation.
Question:
For these data, SS(Sex) = 544,398; SS(Soccer) = 136,610; SS(interaction) = 1,207; and SS(within) = 662,408.
(a) Prepare an interaction graph (like Figure 11.7.3) to investigate whether the male versus female difference is the same for soccer players as for non soccer players.
(b) Does the interaction graph from part (a) suggest that there is an interaction present? If so, what does that mean? If not, what does that mean?
(c) Carry out an F test for interactions; use α = 0.10.
(d) Given the result of the test in part (c), is it appropriate to test the null hypothesis that there is no soccer versus non soccer difference in mean FEV? If so, then conduct that test using α = 0.10. If not, then explain why not.
Step by Step Answer:
Statistics For The Life Sciences
ISBN: 9780321989581
5th Edition
Authors: Myra Samuels, Jeffrey Witmer, Andrew Schaffner