A crossover study of 13 children suffering from asthma (Clinical and Experimental Allergy, vol. 20, pp. 429432,
Question:
Let μ denote the population mean of the difference between the PEF values for the F and S treatments. Use a calculator or software for the following analyses:
a. Form the 13 difference scores, for instance 310 - 270 = 40 for child 1 and 330 - 365 = -35 for child 9, always taking F - S. Construct a dot plot or a box plot. Describe the sample data distribution.
b. Carry out the five steps of the significance test for a mean of the difference scores, using H0: μ = 0 and Ha: μ 0.
c. Discuss whether or not the assumptions seem valid for this example. What is the impact of using a convenience sample?
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Related Book For
Statistics The Art And Science Of Learning From Data
ISBN: 9780321755940
3rd Edition
Authors: Alan Agresti, Christine A. Franklin
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