Confidence Interval for One Population Mean In 1903, a paper published by Abigail Camp Dimon, discussed the effect of environment on the shape and form of two sea snail species. Nassa obsoleta and Nassa trivittata. One of the variables that Dimon considered was the length of the shell. A random sample of 256 N. trivittata specimens was selected. The average shell length for the sample was 12 mm., with a standard deviation of 4 mm. Find the 95% confidence interval for the average shell length of all N. trivittata sea snails.

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Confidence Interval for One Population Mean
In 1903, a paper published by Abigail Camp Dimon, discussed the effect of
environment on the shape and form of two sea snail species. Nassa obsoleta
and Nassa trivittata. One of the variables that Dimon considered was the length
of the shell. A random sample of 256 N. trivittata specimens was selected. The
average shell length for the sample was 12 mm., with a standard deviation of 4
mm.
Find the 95% confidence interval for the average shell length of all N. trivittata
sea snails.
What is the margin of error used to calculate this interval? Do not round.
Transcribed Image Text:Confidence Interval for One Population Mean In 1903, a paper published by Abigail Camp Dimon, discussed the effect of environment on the shape and form of two sea snail species. Nassa obsoleta and Nassa trivittata. One of the variables that Dimon considered was the length of the shell. A random sample of 256 N. trivittata specimens was selected. The average shell length for the sample was 12 mm., with a standard deviation of 4 mm. Find the 95% confidence interval for the average shell length of all N. trivittata sea snails. What is the margin of error used to calculate this interval? Do not round.
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