The goal of a confidence interval for one mean is to provide a range of reasonable values for the (a)____. To create this range of values, we center the interval on the (b)____ and use the (c)___ to help construct a margin of error that provides a measure of the precision of the estimate. (a) Choice 1 of 6: population standard deviation Choice 2 of 6: sample standard deviation Choice 3 of 6: sample of quantitative observations Choice 4 of 6: population mean Choice 5 of 6: sample mean Choice 6 of 6: population of quantitative observations Grading comment: (b) Choice 1 of 6: sample of quantitative observations Choice 2 of 6: population standard deviation Choice 3 of 6: population mean Choice 4 of 6: sample mean Choice 5 of 6: population of quantitative observations Choice 6 of 6: sample standard deviation Grading comment: (c) Choice 1 of 6: population mean Choice 2 of 6: sample standard deviation Choice 3 of 6: population standard deviation Choice 4 of 6: population of quantitative observations Choice 5 of 6: sample mean Choice 6 of 6: sample of quantitative observations