Measurements of human skulls from different epochs are analyzed to determine whether they change over time. The
Question:
Measurements of human skulls from different epochs are analyzed to determine whether they change over time. The maximum breadth is measured for skulls from Egyptian males who lived around 3300 BCE. Results show that those breadths are normally distributed with a mean of 132.6 mm and a standard deviation of 5.4 mm (based on data from Ancient Races of the Thebaid by Thomson and Randall-Maciver). An archeologist discovers a male Egyptian skull and a field measurement reveals a maximum breadth of 119 mm. Find the probability of getting a value of 119 or less if a skull is randomly selected from the period around 3300 BCE. Is the newly found skull likely to come from that era?
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