In a survey of 1,000 television viewers,40% said they watch network news programs.For a 90% confidence level,the margin of error for this estimate is 2.5%.If we want to be 99% confident,how will the margin of error change?

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Quizplus · Accepted Answer

When we want to be more confident, we need to have a wider interval to account for more variability in the data. Therefore, as we increase our confidence level from 90% to 99%, the margin of error will increase. This means that we will have a wider range of values within which the true proportion of viewers who watch network news programs is likely to fall.

In a Survey of 1,000 Television Viewers,40% Said They Watch