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A Population Has a Standard Deviation $\sigma = 20.2$ How Large a Sample Must Be Drawn So That a Large

Question 2
Multiple Choice
Question 2
Multiple Choice

A population has a standard deviation $\sigma = 20.2$ How large a sample must be drawn so that a 98% confidence interval for $\mu$ will have a margin of error equal to 4.2 ?

A) 226
B) 126
C) 11
D) 5

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