The weights of newborns are normally distributed with u = 7.3 lbs and 0 = 0.3 lbs. Use the appropriate z-score table when necessary. Suppose 8 newborns are randomly selected. a.) What is the standard deviation of the sampling distribution of the sample mean? O 0.9125 O 0.1061 O 0.3000 O 0.1936 b.) Compute the z-score for a sample mean of 7.5. O 0.67 O -1.89 O 1.89 O -0.67

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