Suppose a 95% confidence interval was computed based on a sample of 320 trick-or-treaters. If the sample size were increased to 640, what impact would this have on the margin of error and width of the confidence interval? Neither the margin of error nor the width would be affected. The margin of error would decrease and the width would increase. Both the margin of error and the width would decrease Both the margin of error and the width would increase The margin of error would increase and the width would decrease