There are more than 200 million people nationally age 15 or older explain why this along with the ...

The fact that there are more than 200 million people nationally age 15 or older, combined with the fact that the data were obtained using a random sample, satisfies the requirements for constructing a confidence interval because it ensures that the sample is representative of the population. A random sample is one in which each member of the population has an equal chance of being selected, which helps to ensure that the sample is representative of the population. Additionally, the large size of the population ensures that the sample size is large enough to provide an accurate estimate of the population parameters.