Question 273153: The weights of adult chipmunks vary according to a normal distribution with standard deviation 1.4 ounces. Researchers suspect that the mean weights of populations of chipmunks depend on where they live. A team of biologists caught, weighed, and released 15 chipmunks in Rocky Mountain National Park, and the mean weight for this sample was 8.2 oz. Which of the following is a 96% confidence interval for the true mean weight of chipmunks in the park?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! The weights of adult chipmunks vary according to a normal distribution with standard deviation 1.4 ounces. Researchers suspect that the mean weights of populations of chipmunks depend on where they live. A team of biologists caught, weighed, and released 15 chipmunks in Rocky Mountain National Park, and the mean weight for this sample was 8.2 oz. Which of the following is a 96% confidence interval for the true mean weight of chipmunks in the park?
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Using a TI calculator I get:
7.3817< u < 9.0183
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Cheers,
Stan H.
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