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a 95% confidence interval for the mean of a normalpopulation is found to be 17.6 < u < 23.6. what is the margin of error?
a 95% confidence interval for the mean of a normalpopulation is found to be 17.6 < u < 23.6. what is the margin of error?
a. 2.0
b. 2.7
c. 3.0
d. 4.0
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