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The diameters of Douglas firs grown at a Christmas tree farm are normally distributed with a mean of 7 inches and a standard deviation of

The diameters of Douglas firs grown at a Christmas tree farm are normally distributed with a mean of 7 inches and a standard deviation of 1.5 inches. (Round your answers to four decimal places.) A button hyperlink to the SALT program that reads: Use SALT. (a) What proportion of the trees will have diameters between 6 and 8 inches? Incorrect: Your answer is incorrect

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