Suppose (16, 54) is a 98% confidence interval estimate for a population mean.

a) The point estimatex=...........

b) The margin of error =...........

c) Which of the following are true statements?

I. There is a 0.98 probability that is between 16 and 54.

II. There's a 98% chance that any particular value in the population will fall between 16 and 54.

III. 98% of confidence intervals constructed in this population will have a lower limit of 16 and an upper limit of 54.

IV. If 98% confidence intervals are calculated from all possible samples of the given size,is expected to be in 98% of these intervals.

• I and IV
• II and III
• I and III
• IV only
• III only
• I and II