Which of the following statements are true?

I. The larger the margin of error, the narrower the confidence interval.

II. The center of the confidence interval is a population parameter.

III. A confidence interval gives a range for possible values of the sample statistic with a specified level of confidence.

IV. When the confidence level goes down, the confidence interval gets wider.

Question 1 options:

I only

II only

III only

IV only

All the statements are true.

None of the statements are true.