Many National Parks, Wildlife Refuges, and Wilderness Areas Lie Directly $$55.9,51.1,57.5 , \quad 65.5,68.4,64.9,63.1,55.3,63.3$$

Essay

Many national parks, wildlife refuges, and wilderness areas lie directly below designated
military air space. This raises issues of whether wildlife and loud jet noises are compatible.
In an effort to evaluate the effects of low-altitude jet-noise, researchers simulated these
noises for a representative sample of captive desert mule deer. Three minutes after the loud
noises were played, the heart rates (beats per minute) of these animals was measured, with
the following results: $$55.9,51.1,57.5 , \quad 65.5,68.4,64.9,63.1,55.3,63.3$$ a) Calculate and interpret a 95% confidence interval for the mean heart rate 3 minutes after
loud jet noises.
b) The usual mean heart rate for desert mule deer is about 51.2 beats per minute. Does the
confidence interval in part (a) support the view that the loud jet noise has some lingering
effect on the heart rate of desert mule deer? Explain, using appropriate statistical
language.