A store sells "16-ounce" boxes of Captain Crisp cereal. A random sample of 13 boxes was taken and weighed. The sample mean is 16.1 ounces and the sample standard deviation is 0.3 ounces. Assume the weight of cereal in a box is normally distributed. Construct a 90% (two-sided) confidence interval for the overall standard deviation of the weights of boxes of Captoin Crisp cereal. CI = (

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A store sells "16-ounce" boxes of Captain Crisp cereal. A random sample of 13 boxes was taken and weighed.
The sample mean is 16.1 ounces and the sample standard deviation is 0.3 ounces.
Assume the weight of cereal in a box is normally distributed.
Construct a 90% (two-sided) confidence interval for the overall standard deviation of the weights of
boxes of Captain Crisp cereal.
CI = (
Notes: You can express your answer as a fraction or decimal. If you answer is in decimal, include at least
4 non-zero digits after the decimal point.
Hint: Standard deviation is always non-negative!
Transcribed Image Text:A store sells "16-ounce" boxes of Captain Crisp cereal. A random sample of 13 boxes was taken and weighed. The sample mean is 16.1 ounces and the sample standard deviation is 0.3 ounces. Assume the weight of cereal in a box is normally distributed. Construct a 90% (two-sided) confidence interval for the overall standard deviation of the weights of boxes of Captain Crisp cereal. CI = ( Notes: You can express your answer as a fraction or decimal. If you answer is in decimal, include at least 4 non-zero digits after the decimal point. Hint: Standard deviation is always non-negative!
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