A random sample of n measurements was selected from a population with standard deviation o = 15.8 and unknown mean . Calculate a 95 % confidence interval for / for each of the following situations: (rounded to 2 decimals) (a) n = 55, I = 98 (b) n = 80, I = 98 (c) n = 110, x = 98 SUS (d) In general, we can say that for the same confidence level, increasing the sample size the margin of error (width) of the confidence interval. (Enter: "DECREASES", "DOES NOT CHANGE" or "INCREASES", without the quotes.)