A poll asked a group of people if the fact that they can mak

A poll asked a group of people if the fact that they can make copies of songs on the Internet for free made them more likely-or less likely-to buy a performer\'s CD. Only 14% responded that it made them \"less likely.\" The poll was based on a random sample of 691 Internet users. Check that the assumptions and conditions are met for inference on proportions. Find the 99% confidence interval for the true proportion of all Internet users who are \"less likely\" to buy CDs. If only the success \'failure condition is not satisfied, then instead construct an adjusted 99% confidence interval using the pseudo observation method. a) Check the assumptions and conditions. Choose the correct answer below. The independence assumption is violated; whether one person is \"less likely\" to buy a performer\'s CD is dependent on whether another person is \"less likely\" to buy a performer\'s CD. This was a random sample of less than 10% of all Internet users; there were at least 10 successes and 10 failures, so the sample is large enough. This was a random sample of less than 10% of all Internet users; there are less than 10 successes, so the sample is not large enough. This was a random sample of more than 10% of all Internet users; the sample is too large.

Solution

The condition is that the sample has to be less than 10% of users. This is satisfied because there are millions of users of the internet.

Another conditions is that there is at least 10 successes and failures. Here, there are 691*0.14 = 97 successes and 594 failures.

Thus it is

OPTION B: This was a random sample of less than 10% of all internet users; there are at least 10 successes and 10 failures, so the sample is large enough. [ANSWER, B]