A woman wrote to Dear Abby and claimed that she gave birth 308 days after a visit

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A woman wrote to Dear Abby and claimed that she gave birth 308 days after a visit from her husband, who was in the Navy. Lengths of pregnancies have a mean of 268 days and a standard deviation of 15 days. Find the z score for 308 days. Is such a length unusual? What do you conclude?

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Elementary Statistics

ISBN: 9780321500243

11th Edition

Authors: Mario F. Triola

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