Mathematics, 02.07.2020 23:01 emilyscroggins794
A sample of 50 cotton threads shows the mean breaking strength to be 220 grams and the sample standard deviation to be 12 grams. What is the 95% confidence interval for the standard deviation of breaking strength of the thread.
Answers: 2
  
  
represent the sample mean 
population mean 
 (1)
and 
, the critical value for this case is 
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A sample of 50 cotton threads shows the mean breaking strength to be 220 grams and the sample standa...
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