Population standard deviation


Two hundred fish caught in the Cayuga Lake had mean length of 13.9 inches. The population standard deviation is 3.6 inches. (Give your answer correct to two decimal places.)

(a) Find the 90% confidence interval for the population mean length.

Lower Limit

Upper Limit

(b) Find the 98% confidence interval for the population mean length.

Lower Limit

Upper Limit

 

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Basic Statistics: Population standard deviation
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