# Question: A Obtain individual normal probability plots and the standard deviations

a. Obtain individual normal probability plots and the standard deviations of the samples.

b. Perform a residual analysis.

c. Decide whether presuming that the assumptions of normal populations and equal standard deviations are met is reasonable.

b. Perform a residual analysis.

c. Decide whether presuming that the assumptions of normal populations and equal standard deviations are met is reasonable.

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