Question: Exercise 3. Use the dnorm() function to plot the normal distribution curves (PDFs) for N( = 20, = 2) and N( = 20, = 4).

Exercise 3. Use the dnorm() function to plot the normal distribution curves (PDFs) for N( = 20, = 2) and N( = 20, = 4). Include both curves on the same plot. Comment on how changing the standard deviation parameter affects the shape of the normal curve

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