Which of the following are key differences between the Warsaw Pact and NATO?

The United States did not join the Warsaw Pact but joined NATO.
NATO outlasted the Cold War period, while the Warsaw Pact did not.
NATO members provided military protection for its member states, while the Warsaw Pact provide economic stability.
The Warsaw Pact has a strong influence on today’s world, while NATO does not.
I and II
I and III
I and IV
II and IV
III and IV

In a recent telephone survey, 5,000 randomly selected teenagers were asked to cite their primary social network site. six of 10 teenagers said they use mybook as their primary social network site. a 95% confidence interval to estimate the true proportion of teenagers who use mybook as their primary social network site is found to be (0.2964, 0.9036). which of the following is a correct interpretation of the confidence level? ninety-five percent of all samples of this size would yield a confidence interval of (0.2964, 0.9036). there is a 95% chance that the true proportion of teenagers who use mybook as their primary social network site is in the interval (0.2964, 0.9036). ninety-five percent of the time, the procedure used to generate this interval will capture the true proportion of teenagers who use mybook as their primary social network site. ninety-five percent of all the samples of size 5,000 lie in the confidence interval (0.2964, 0.9036).