Mathematics, 14.12.2019 02:31, ericgalo808
Pilates is a popular set of exercises for the treatment of individuals with lower back pain. the method has six basic principles: centering, concentration, control, precision, flow, and breathing. an article reported on an experiment involving 90 subjects with nonspecific low back pain. the participants were randomly divided into two groups of equal size. the first group received just educational materials, whereas the second group participated in 6 weeks of pilates exercises. the sample mean level of pain (on a scale from 0 to 10) for the control group at a 6-week follow-up was 5.2 and the sample mean for the treatment group was 3.1; both sample standard deviations were 2.5.
a. does it appear that true average pain level for the control condition exceeds that for the treatment condition by more than 1 at a significance level of 0.01? carry out a test of appropriate hypotheses using significance level of .01
b. does it appear that the true average pain level for the control condition exceeds that for the treatmnet condition by more than 1? carry out a test of appropriate hypotheses
Answers: 2
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