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A sample of size n= 15 has sample mean x= 2.1 and sample standard deviation s= 1.7. If the sample size were n= 25 and

A sample of size n= 15 has sample mean x= 2.1 and sample standard deviation s= 1.7. If the sample size were n= 25 and the sample standard deviation was unchanged, would the 95% confidence interval be narrower or wider? Why

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