Preliminary sample standard deviation

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Reference no: EM131724838

A 95% confidence interval for the mean of a population is to be constructed and must be accurate to within 0.3 unit. A preliminary sample standard deviation is 2.3. The smallest sample size n that provides the desired accuracy is 

a) 230

b) 226

c) 215

d) 223

e) 232

f) None of the above

Reference no: EM131724838

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