Made in America In a recent Harris Poll, a random sample of adult Americans (18 years and older) was asked, “When you see an ad emphasizing that a product is ‘Made in America,’ are you more likely to buy it, less likely to buy it, or neither more nor less likely to buy it?” The results of the survey, by age group, are presented in the contingency table below.

f. Write a few sentences describing any observed relationship between the likelihood to buy and age.

Which sampling method involves dividing the population into groups ($\mathrm{strata}$) and then taking a random sample from each group?

Nonresponse bias occurs when which of the following happens in a probability sample?

Consider the following probability distribution for a discrete random variable $X$: $X$: $1$ $2$ $3$ $4$, $P\left(X\right)$: $0.1$ $0.3$ $0.4$ $0.2$. Which of the following statements is true about this distribution?

Complete each statement: An event with a probability of $0$ is ____, and an event with a probability of $1$ is ____.