What does this margin of error tell you about the percentage of adults who keep the lights on at night? We can be 95% confident that somewhere between   % and   % of adults keep the lights on at night.

A marketing agency wanted to determine if a new commercial changed people's opinion about a company. They recruited n=30 participants to watch the commercial. First, everyone was givien a survey to determine their attitudes toward the company. Then, everyone watched the new commercial. Finally, they were given the same survey again and asked about their attitudes toward the comapny after seeing the commercial. The agency wanted to see if attitudes were changed by the commercial. What statistical test should they use?

In a recent poll, 390 people were asked if they liked dogs, and 33% said they did. Find the Margin of Error for this poll, at the 99% confidence level. Give your answer to four decimal places if possible.

At one large college, 1867 out of the 2500 students surveyed said they plan to take another science class.Find the 95% confidence interval for the proportion of students that said they plan to take another science class.  ?   %  to   ? %

In a recent poll, 450 people were asked if they liked dogs, and 54% said they did. Find the Margin of Error for this poll, at the 95% confidence level. Give your answer to four decimal places if possible.

A Pew Internet Project Data Memo presented data comparing adult gamers with teen gamers with respect to the devices on which they play. The data are from two surveys. The adult survey had 1063 gamers, while the teen survey had 1064 gamers. The memo reports that 54% of adult gamers played on game consoles (Xbox, PlayStation, Wii, etc.), while 89% of teen gamers played on game consoles.  Suppose you want to construct a 95% confidence interval for the difference.  You want to test were or not the two proportions (adult using consoles vs teens using consoles) are the same.  You have to calculate a pooled estimate for the proportion.  What would that be?  (Please round to three decimal places)

In a recent poll, 600 people were asked if they liked dogs, and 33% said they did. Find the Margin of Error for this poll, at the 95% confidence level. Give your answer to four decimal places if possible.

In a recent poll, 230 people were asked if they liked dogs, and 72% said they did. Find the Margin of Error for this poll, at the 90% confidence level. Give your answer to four decimal places if possible.

In a recent poll, 390 people were asked if they liked dogs, and 83% said they did. Find the Margin of Error for this poll, at the 90% confidence level. Give your answer to four decimal places if possible.

The question was asking for 99% confidence interval for pop