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In each case, sketch the two speciﬁed normal curves on the same set of axes:
a A normal curve with m 20 and s 3, and a normal curve with m 20 and s 6.
b A normal curve with m 20 and s 3, and a normal curve with m 30 and s 3.
c A normal curve with m 100 and s 10, and a normal curve with m 200 and s 20.

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