SOLUTION: Find the appropriate minimum sample size. To be able to say with 95% confidence level that the standard deviation of a data set is within 20% of the population's standard deviat

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Question 869531: Find the appropriate minimum sample size.
To be able to say with 95% confidence level that the standard deviation of a data set is within 20% of the population's standard deviation, the number of observations within the data set must be greater than or equal to what quantity?
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!



Hi

 .20SD = 1.96SD/sqrt(n)

  n = (1.96/.200)^2 = 96.04  

Rounded Up 97

the number of observations within the data set must be greater than or equal to what quantity? 97 

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