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Show that the differential equation of Exercise 30 with b = c = 0 and a > 0 yields a normal distribution.
Exercise 30
Karl Pearson, one of the founders of modern statistics, showed that the differential equation
yields (for appropriate values of the constants a, b, c, and d) most of the important distributions of statistics. Verify that the differential equation gives
(a) the gamma distribution when a = c = 0, b > 0, and d > -b;
(b) the exponential distribution when a = c = d = 0 and b > 0;
use the moment-generating function technique to rework this problemif xsub1 and xsub2 are independent random variables
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