The St. Lucie County Economic Development Board needs to estimate the proportion of all county residents who have earned at least a bachelor's degree. A random sample conducted by the St. Lucie County Economic Development Board found that 19.3% of all county residents held at least a bachelor's degree. Find three different confidence intervals - one with sample size 254, one with sample size 478, and one with sample size 668. Assume that 19.3% of the county residents in each sample have earned at least a bachelor's degree. Notice how the sample size affects the margin of error and the width of the interval. Report confidence interval solutions using interval notation. Report all solutions in percent form, rounded to two decimal places, if necessary. When n=254, the margin of error for a 97% confidence interval is given by . When n=254, a 97% confidence interval is given by .   When n=478, the margin of error for a 97% confidence interval is given by . When n=478, a 97% confidence interval is given by .   When n=668, the margin of error for a 97% confidence interval is given by . When n=668, a 97% confidence interval is given by

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