Question: The Gallop organization surveyed 1252 debit card holders in the US and found that 180 had used the debit card to purchase a product or service on the internet.

Describe the population of interest to the Gallop organization.

Is the sample size large enough to construct a valid confidence interval for the proportion of debit card holders who have used their card in making purchases over the internet?

Estimate the proportion referred to in part b using 99% confidence interval. Interpret your results in the context of the problem. If you had constructed a 90% confidence interval instead, would it be wider or narrow?