Perform the test in Problem 8.44 using both the raw and ln scale, and report a p-value. Are there any advantages to using the raw or the ln scale?

Renal Disease

Ten patients with advanced diabetic nephropathy (kidney complications of diabetes) were treated with captopril over an 8-week period [9]. Urinary protein was measured before and after drug therapy, with results listed in Table 8.16 in both the raw and ln scale.

Table 8.16: Changes in urinary protein after treatment with captopril

 

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In scale urinary protein In (g/24 hr) Raw scale urinary protein (g/24 hr) Patient Before After Before After 25.6 10.1 3.24 2.31 17.0 5.7 2.83 1.74 3 16.0 5.6 2.77 1.72 4 10.4 3.4 2.34 1.22 5 8.2 6.5 2.10 1.87 0.7 7.9 0.7 2.07 -0.36 5.8 6.1 1.76 1.81 8. 5.4 4.7 1.69 1.55 5.1 2.0 1.63 0.69 10 4.7 2.9 1.55 1.06