The accompanying data is a subset of the data reported in the article “Synovial Fluid pH, Lactate, Oxygen and Carbon Dioxide Partial Pressure in Various Joint Diseases” (Arthritis and Rheumatism, 1971: 476–477). The observations are pH values of synovial fluid (which lubricates joints and tendons) taken from the knees of individuals suffering from arthritis. Assuming that true
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The data is a subset of observations from an article discussing synovial fluid pH values in individuals with arthritis. The pH values are taken from the knees of these individuals. Show more…
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The degenerative disease osteoarthritis most frequently affects weight-bearing joints such as the knee. The article "Evidence of Mechanical Load Redistribution at the Knee Joint in the Elderly when Ascending Stairs and Ramps" (Annals of Biomed. Engr., 2008: 467–476) presented the following summary data on stance duration (ms) for samples of both older and younger adults: Age Sample Size Sample Mean Sample SD Older 28 801 117 Younger 16 780 72 Carry out a test of hypotheses at significance level .05 to decide whether true average stance duration is larger among elderly individuals than among younger individuals. Assume variances are unequal.
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The degenerative disease osteoarthritis most frequently affects weight-bearing joints such as the knee. An article presented the following summary data on stance duration (ms) for samples of both older and younger adults. Age Older Younger Sample Size 27 15 Sample Mean 809 790 Sample SD 117 71 Assume that both stance duration distributions are normal. (a) Calculate a 99% CI for true average stance duration among elderly individuals. ms Interpret your 99% CI. With 99% confidence, we can say that the true average stance duration among elderly individuals falls between these values. (b) Carry out a test of hypotheses at significance level 0.05 to decide whether true average stance duration is larger among elderly individuals than among younger individuals. (Use ÎĽ1 for elderly individuals and ÎĽ2 for younger individuals.) State the relevant hypotheses. H0: ÎĽ1 - ÎĽ2 = 0 Ha: ÎĽ1 - ÎĽ2 > 0 Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to three decimal places.) t = P-value =
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Arthritis is increasingly prevalent among the United States population. Although there are several types of arthritis, the most common (by far) is osteoarthritis. According to the CDC, more than 30 million Americans are diagnosed with osteoarthritis (2018). It’s likely that you or someone you know is struggling with the pain and stiffness associated with osteoarthritis right now. In your discussion post this module, provide at least one prevention technique and one treatment option for osteoarthritis. Describe each item in detail, providing information about how the therapies you chose affect the physiology of the arthritic joints. IMPORTANT: Cite any reference (s) used within APA 7 format guidelines.
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