Question
25. In analyzing a lot in sample random variation, you find a sampling standard deviation of 5%.
Assuming negligible error in the analytical procedure, how many samples must you analyze
to get a standard deviation of 4% with 90% confidence?
B. 9
C. 7
D. 6
E. 5
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Transcribed Image Text

25. In analyzing a lot in sample random variation, you find a sampling standard deviation of 5%. Assuming negligible error in the analytical procedure, how many samples must you analyze to get a standard deviation of 4% with 90% confidence? B. 9 C. 7 D. 6 E. 5