You have constructed a 95% confidence interval to estimate the mean number of people downloading music files from the internet using a sample of 150 people.Which of the following statements is/are true?
I.A 95% Confidence interval will be wider than a 99% confidence interval.
II.Sampling a smaller number of people will increase the margin of error.
III.Changing the sample size will change the value of t*.

A) I,II,III
B) I,II
C) I
D) II
E) II,III

Confidence Interval

A range of values, derived from sample statistics, that is believed to contain the true value of an unknown population parameter with a specified level of confidence.

Margin Of Error

A statistic expressing the amount of random sampling error in a survey's results, indicating the expected range in which the true value lies.

Sample Size

The number of observations or individuals in a subset of a population selected for analysis or experimentation.