Many national parks, wildlife refuges, and wilderness areas lie directly below d

Question

Many national parks, wildlife refuges, and wilderness areas lie directly below designated military airspace. This raises issues of whether wildlife and, for example, loud jet noises are compatible. In an effect to evaluate the effects of low altitude jet noises, researchers simulated these noises for captive desert mule deer. Three minutes after the loud noises were played, the heart rates of these animals were measured, with the following results:

55.9, 51.1, 57.5, 65.5, 68.4, 64.9, 63.1, 55.3, 63.3

Assume that it is reasonable to think that these deer can be regarded as a random sample of desert mule deer.

a) Calculate and interpret a 95% confidence interval for the mean heart rate 3 minutes after the loud jet noises

b) The mean heart rate for desert mule deer is about 51.2 beats per minute. Based on the confidence interval in part (a), do you think that the loud jet noises has some lingering effect on the heart rate of desert mule deer? Explain.

Explanation / Answer

a) Sample mean will be = 60.56

Standard deviation = 5.7761

Margin of error = (2.306*5.7761)/Sqrt(9) = 4.4399

95% Interval

(60.56-4.4399, 60.56+4.4399)

=(56.12, 65.00)

b) Since, 51.2 does not lies between the interval, So, we conclude that loud jet noises has some lingering effect on the heart rate of desert mule deer

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