Question

If you live in California, the decision to purchase earthquake insurance is a critical one. An article in the Annals of the Association of American Geographers investigated many factors that California residents consider when purchasing earthquake insurance. The survey revealed that only 122 of 342 randomly selected residences in Los Angeles County were protected by earthquake insurance. Estimate with 97% confidence the proportion of all L.A. County residences that have earthquake insurance. (Round to 3 decimal places.)

Complete the following sentence to provide an interpretation of the confidence interval in the context of the problem:

We are 97% confident that the (Click to select)samplepopulation   (Click to select)standard deviationmeanproportion  of (Click to select)all342 L.A. County residences that have earthquake insurance is between and .

Answer 1