Arrows A team of anthropologists headed by researcher Nicole Waguespack studied the

Chapter 22, Problem 47

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Arrows A team of anthropologists headed by researcher Nicole Waguespack studied the difference between stonetipped and wooden-tipped arrows. Stone arrow tips are tougher, but also take longer to make. Many cultures used both types of arrow tips, including the Apache in North America and the Tiwi in Australia. The researchers set up a compound bow with 60 lbs. of force. They shot arrows of both types into a hide-covered ballistics gel. (Waguespack, Nicole, et. al., Antiquity, 2009) a) Here are the data for seven shots at the target with a wooden tip. They measured the penetration depth in mm. Find and interpret a 95% confidence interval for the penetration depth. 216 211 192 208 203 210 203 b) Here are the penetration depths (mm) for seven shots with a stone tip. Find and interpret a 95% confidence interval for the penetration depth. 240 208 213 225 232 214 240