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Question: qi solve the modified exercise 8120 p 422 in your...

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Qi: Solve the modified exercise 8.120 (p. 422) in your textbook. (5 points) Shaft graves in ancient Greece. Archeologists have discovered a rise in shaft graves during the Middle Helladic period in ancient Greece (i.e., around 2000 BC). Shaft graves are named for the beautifully decorated sword shafts that are buried along with the bodies. An analysis of shaft graves was carried out and published in the American Journal of Archaeology (Jan. 2014). The table below gives the number of shafts buried at each of 13 recently discovered grave sites. 1 231 5 6241 24 2 9 Let σ represent the standard deviation of the number of sword shafts for the population of all shaft graves in ancient Greece. Is there sufficient evidence to conclude that the true standard deviation of the number of sword shafts is less than 3?

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