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[Solved]Is a stats question,just need some clarity on it-"total width of less than 2.
Hi.The result of a memory test is known to be normally distributed with mean mew and standard deviation 1.0. It's required to have a 95% confidence interval for mew with a total width of less than 2.0.Find the least possible number of tests needed to achieve this.*The "total width of less than 2.0" mean what?
?
P(Z<2.0)=0.95
(X-mew)/(1.9/n^.5)<2.0,where X=the mean
mew<2.0
I'm stuck here,I'm sure something is wrong with it.So pls explain the thing with the * above?
Homework Statement
Hi.The result of a memory test is known to be normally distributed with mean mew and standard deviation 1.0. It's required to have a 95% confidence interval for mew with a total width of less than 2.0.Find the least possible number of tests needed to achieve this.*The "total width of less than 2.0" mean what?
Homework Equations
?
The Attempt at a Solution
P(Z<2.0)=0.95
(X-mew)/(1.9/n^.5)<2.0,where X=the mean
mew<2.0
I'm stuck here,I'm sure something is wrong with it.So pls explain the thing with the * above?
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