Module 12a Activity

Confidence Interval for a Proportion

Canadian Attitudes Toward Guns: A survey asked a random sample of 1,505 adult Canadians "Do you agree or disagree that firearms should be registered?" Of the 1,505 in the sample, 1,288 agreed. 

Using the formula for a confidence interval for a proportion, calculate the 95% confidence interval for the proportion of adult Canadians who believe firearms should be registered.

a) Use the formula below (and the table below) to find the interval. Show your work and/or describe the process. Remember that you do NOT need to consider degrees of freedom. Refer to the Module 12a Slides lecture for a practice example.

b) Finish the statement, "Based on the sample results, we can be 95% certain...