A 95% confidence interval for a population mean is determined to be 100 to 120. If the confidence coefficient is reduced to 0.90, the interval for mu
A. becomes narrower
B. becomes wider
C. does not change
D. becomes 0.1
Answer:A
A 95% confidence interval for a population mean is determined to be 100 to 120. If the confidence coefficient is reduced to 0.90, the interval for mu
A. becomes narrower B. becomes wider C. does not change D. becomes 0.1